Bear form at Level 2 hands Circle of the Moon Druids 30 HP on top of their own health pool — more than any warrior-class character starts with, and it regenerates on every short rest. Every other Druid subclass waits until Level 6 for Owlbear to approach that durability. By that point, the Moon Druid’s Bear has grown to 51 HP.
That early lead is why Circle of the Moon dominates Act 1. The subclass’s real arc runs to Level 10, when Elemental Myrmidons unlock with 90–103 base HP and three attacks per round. Which Myrmidon you pick at Level 10 determines whether your Tavern Brawler feat fires or goes to waste — and most guides miss which forms break the combo entirely.
This guide maps every Wild Shape unlock to its druid level, shows how HP and damage dice scale at each Wild Shape Improvement breakpoint, and gives you a form decision for each act from the Emerald Grove to Baldur’s Gate.
New to BG3 entirely? Our BG3 Beginner’s Guide covers the three best starter classes and the Act 1 choices you can’t undo before you commit to any build.
Verified on BG3 Patch 7/8 (PC), Circle of the Moon Druid Levels 2–12.
Quick Start: 7 Steps to a Functional Moon Druid
- Level 1: Set WIS 17, CON 14, DEX 14 at character creation (Racial +1 brings WIS to 17+)
- Level 2: Choose Circle of the Moon → Bear Wild Shape unlocks immediately
- Combat opener: cast Spike Growth, then Bonus Action Wild Shape into Bear — spike ticks apply to enemies moving through the field while you’re tanking
- Level 4: Take Tavern Brawler feat — adds STR modifier as unresistable bonus damage to every Wild Shape attack
- Level 6: Switch primary form to Owlbear (65 HP, STR 20, AC 15) — use Enrage on transform for +12 temporary HP
- Level 8: Bring Sabre-Toothed Tiger against armored enemies to stack Shred Armour (–2 AC per hit)
- Level 10: Default to Earth Myrmidon (103 HP, AC 18, three attacks) — Tavern Brawler fully applies here
Who Should Play Circle of the Moon?
| Player Type | Verdict | Focus On |
|---|---|---|
| New Player | Strong choice — Bear form auto-tanks Act 1 without complex spell management | Use Goading Roar to pull aggro; let your party handle spell strategy |
| Casual | Excellent — simple spell-then-shift rotation scales through all three acts | Owlbear from Level 6 through early Act 3; Earth Myrmidon from Level 10 |
| Hardcore Optimizer | High ceiling — Tavern Brawler + Spike Growth + multiclass dip unlocks top-tier damage | Track Strength modifier per form; track Myrmidon exclusions; consider Fighter 1 dip |
| Completionist | 15 total forms, 8 Moon-exclusive or earlier-unlocking; worth cataloguing all | Collect Dire Raven (Moon L4) and Dilophosaurus (all druids L10); note HP per form |
If pure spellcasting is your goal, Circle of the Land is stronger. If you want debuff-centric shapeshifting with necrotic damage, our BG3 Spore Druid build covers that subclass in detail. If you want a melee frontliner with two health bars and genuine spell support, Circle of the Moon is the best single-class option in BG3.
Subclass Features: What Circle of the Moon Actually Gets
Level 2 — Combat Wild Shape
Every druid can Wild Shape, but Circle of the Moon transforms as a Bonus Action rather than an Action in combat. That distinction changes your turn economy entirely. A base druid spends their Action to shift — losing an attack or spell. Moon Druids spend a Bonus Action, leaving their Action free to cast a concentration spell first.
The standard opener: cast Spike Growth (Action) → Wild Shape into Bear (Bonus Action) → Bear attacks begin next round. The concentration spell runs independently of your beast form, meaning you’re dealing area damage and soaking hits simultaneously.
Level 2 — Lunar Mend
Lunar Mend lets you expend a spell slot while Wild Shaped to regain 1d8 HP per slot level — without breaking form. A Level 2 slot restores 2d8 HP (9 average) as a Bonus Action. Use Level 1–2 slots for mid-combat Mend; save Level 3+ for control spells cast before shifting. A Bear running at 5 HP can recover to 14 HP in the same turn the enemy attacks it.
Level 6 — Primal Strike
Wild Shape attacks count as magical from Level 6 onward. This is mandatory for Act 2, where shadow-cursed undead and constructs in Moonrise Towers have damage resistance to non-magical weapons. Without Primal Strike, your Owlbear claws deal half damage to these enemies. With it, the Owlbear hits at full value.
Level 10 — Elemental Wild Shape + Improved Wild Strike
Two features unlock simultaneously. Elemental Wild Shape provides four Myrmidon forms, each costing 2 charges that refill on long rest. Improved Wild Strike gives a third attack per round in any Wild Shape. That three-attack opener lands the turn you hit Level 10 — the Myrmidon forms and the extra attack arrive together.
Wild Shape Form Progression: BG3’s Level-Gate System
D&D 5e gates Wild Shape by Challenge Rating: CR ¼ at Level 2, CR ½ at Level 4, CR 1 at Level 8. Baldur’s Gate 3 doesn’t expose CR values — instead, forms unlock at specific druid levels. The table below maps BG3’s actual unlock system, including approximate D&D 5e CR equivalents for reference, along with the HP and key ability you’ll see in-game.
Separate from form unlocks, Wild Shape attacks gain bonus damage dice at three breakpoints:
| Level | Bonus Damage Die Added | Bear Claw Example |
|---|---|---|
| 2 (base) | None | 1d6 slashing |
| 4 | +1d4 | 1d6 + 1d4 slashing |
| 8 | +1d6 | 1d6 + 1d6 slashing |
| 12 | +1d8 | 1d6 + 1d8 slashing |
These improvements apply to every form — Bear at Level 4 hits harder than Bear at Level 2 even though it’s the same form.
Complete Form Unlock Table:
| Unlock Level | Form | HP at Unlock | AC | Moon Excl. | ~D&D CR | Best Use |
|---|---|---|---|---|---|---|
| 2 | Bear | 30 | 12 | ✓ | 2 | Act 1 primary tank; Goading Roar taunt |
| 2 | Wolf | 18 | 13 | ✗ | ¼ | Flanking enabler; Pack Tactics advantage |
| 2 | Spider | 20 | 12 | ✗ | 1 | Early crowd control via Web (Restrained) |
| 2 | Badger | 13 | 10 | ✗ | 0 | Prone application only; bench-warming otherwise |
| 2 | Cat | 2 | 12 | ✗ | 0 | Scouting only — 2 HP in combat is a death sentence |
| 4 | Deep Rothé | 23 | 11 | ✗ | ¼ | Gas cloud AoE niche; mostly skippable |
| 4 | Dire Raven | 13 | 11 | ✓ | N/A | Rend Vision (Blinded) — blind enemy casters |
| 6 | Panther | 45 | 12 | ✗ | ¼ | Stealth + bonus pounce damage; niche pick |
| 6 | Owlbear | 65 | 15 | ✗ | 3 | Act 2 primary; Enrage for +12 temp HP on shift |
| 8 | Sabre-Toothed Tiger | 67 | 12 | ✓ | 2 | Shred Armour (–2 AC/hit) — armored boss debuffer |
| 10 | Dilophosaurus | 74 | 13 | ✗ | N/A | Acid/poison damage; use vs. specific resistances |
| 10 | Air Myrmidon | 90 | — | ✓ | ~6 | Invisibility + stun; opener for ambush scenarios |
| 10 | Earth Myrmidon | 103 | 18 | ✓ | ~7 | Default Act 3 pick; Tavern Brawler fully applies |
| 10 | Fire Myrmidon | 90 | — | ✓ | ~6 | Skip if using Tavern Brawler — feat excluded here |
| 10 | Water Myrmidon | 90 | — | ✓ | ~6 | Support role; Healing Vapours — TB excluded here |
~D&D CR values are approximate equivalents based on published 5e monster stats — BG3 does not display CR values in-game.
Act 1 (Levels 1–4): Bear is Your Identity
The moment you hit Level 2 and pick Circle of the Moon, open the Wild Shape menu. Bear is immediately available at 30 HP — no research required, no fetch quest. That’s your second health bar, on top of your druid’s own pool, and it comes back on every short rest.
Bear’s combat role in Act 1 is simple: Goading Roar pulls enemy attention onto you, freeing your party’s squishier members to attack without focus fire. The bear absorbs 2–3 hits before Lunar Mend becomes necessary. When it does, burn a Level 1 slot for 1d8 HP restore and keep fighting.
Your Act 1 spell priority, cast before shifting:
- Spike Growth (Level 2): Place in chokepoints before transforming — Bear walks into melee while enemies take 2d4 piercing each time they enter or move through the field
- Healing Word (Level 1): Bonus Action heal for downed allies — you can cast this while in humanoid form then shift the same turn
- Faerie Fire (Level 1): Advantage on all attacks against lit targets — cast first, then shift to Bear to maximize attack rolls
At Level 4, take Tavern Brawler. This is the build’s single most important feat. Tavern Brawler adds your Strength modifier as a bonus to both the attack roll and damage roll of Wild Shape attacks, and the bonus has no damage type — meaning nothing in the game can resist it. Bear sits at STR 19 (+4 modifier). Two Bear Claws per round = +8 unresistable bonus damage per turn, before base damage rolls. The Level 4 Wild Shape Improvement stacks another 1d4 per hit on top of that.
Act 1 gear worth grabbing: Amulet of Silvanus (Druid Grove) — while Wild Shaped, your healing spells restore an additional 1d6+1 HP. This extends how long Lunar Mend sustains you between short rests.
Act 2 (Levels 5–8): Owlbear Dominance
Level 5 brings Wild Strike — a second attack per round in Wild Shape. Level 6 is the major form upgrade: Owlbear unlocks at 65 HP, STR 20, and AC 15, replacing Bear as your primary combat form.
Three things make Owlbear a meaningful step up from Bear:
- HP at unlock: Owlbear starts at 65 HP vs Bear’s 51 HP at the same level — a 14 HP advantage on an already-tanky form
- Enrage: Bonus Action that grants +2 STR/CON, 12 temporary HP, and 3 Rage Charges per encounter. Pop Enrage the turn you shift for an immediate 12 HP buffer. The +2 STR also boosts Tavern Brawler’s damage bonus
- Crushing Flight: Bonus Action leap with knockdown — combine with two Claw attacks for full-round melee pressure while maintaining a knocked-down enemy
Level 6 also brings Primal Strike, and it matters immediately. Moonrise Towers in Act 2 is full of undead and constructs with damage resistance to non-magical attacks. Without Primal Strike your Owlbear claws deal half damage to the Shadows, Wraiths, and Flesh Golems in that zone. With it, full damage applies — this is the difference between feeling weak and feeling dominant in Act 2’s toughest areas.
At Level 8, take War Caster for advantage on Concentration saving throws. By this point you’re holding Spike Growth or Moonbeam through entire combat rounds. Enemy attacks trigger Concentration checks every hit — War Caster cuts the failure rate significantly on any roll above 1.
Also at Level 8, Sabre-Toothed Tiger unlocks as a Moon-exclusive form. Don’t bench Bear for it — Sabre-Toothed Tiger’s value is the Shred Armour debuff. Each hit applies –2 AC, which stacks across multiple attacks and benefits every party member’s attack rolls against that target. On an armored boss that takes three rounds to kill, stacking –6 to –8 AC effectively grants advantage-level accuracy to your entire party.
Act 2 equipment:
- Barkskin Armor: AC 16 and advantage on Concentration saves — doubles up with War Caster for near-guaranteed concentration hold
- Melf’s First Staff (Act 2 vendor): +1 spell attack rolls and advantage on Concentration saves — alternative if Barkskin Armor is unavailable
Act 3 (Levels 9–12): Earth Myrmidon and the Tavern Brawler Trap
Level 10 is the biggest power spike in the build. Improved Wild Strike adds a third attack per round. The four Elemental Myrmidons unlock simultaneously. At maximum output — three attacks per round with Tavern Brawler active — the choice of Myrmidon form is the difference between 12 unresistable bonus damage per round and zero.
Which Myrmidons work with Tavern Brawler and which don’t:
| Myrmidon | HP | AC | Tavern Brawler | Primary Damage | Verdict |
|---|---|---|---|---|---|
| Earth | 103 | 18 | ✓ Applies | Physical + Thunder rider | ✓ Default pick |
| Air | 90 | — | ✓ Applies | Physical + Lightning rider | Mobility alternative |
| Fire | 90 | — | ✗ Excluded | Fire damage only | Skip for TB builds |
| Water | 90 | — | ✗ Excluded | Cold + Healing Vapours | Support role only |
Fire and Water Myrmidons use elemental-type attacks that the Tavern Brawler mechanic explicitly skips. Players who shift to Fire Myrmidon expecting TB to proc are playing significantly below their damage ceiling for the entire Act 3. Earth Myrmidon is the correct default: 103 HP, AC 18 (25 with Muck to Metal active), STR 18 (+4 modifier) for Tavern Brawler, and Burrow for free repositioning as a Bonus Action.
Earth Myrmidon + Spike Growth (Patch 8 interaction): Following Patch 8, Tavern Brawler applies its STR modifier bonus to spell damage dealt while shapeshifted — including Spike Growth’s piercing damage ticks. Cast Spike Growth before shifting to Earth Myrmidon, and every enemy forced to move through the field takes extra STR modifier damage per tick. Larian has flagged this as unintended, but it’s currently live.
At Level 9, add Conjure Elemental to your pre-combat sequence. A summoned Earth Elemental tanks alongside your Earth Myrmidon for overwhelming action economy. Level 7 unlock Conjure Woodland Being remains useful here — its Dryad casts a free Spike Growth, preserving your own spell slots for higher-level control spells.
Act 3 equipment:
- Armor of Moonbasking: Grants 22 temporary HP every time you Wild Shape — a free buffer on each shift, which stacks with Enrage’s 12 temporary HP
- Markoheshkir (Act 3 vendor): Free Level 6 spell slot per long rest — budget for Heal, Heroes’ Feast, or Wall of Thorns
- Helm of Balduran: Advantage on all saves, immunity to Stun and Crit — prevents single-hit CC that removes your form
- Amulet of Greater Health: Sets CON to 23, turning every Concentration check into a formality
Stats, Race, and Starting Scores
| Ability | Priority | Starting Value | Notes |
|---|---|---|---|
| Wisdom | Primary | 17 | Spell save DC and Perception; aim for 20 via ASI or Mirror of Loss |
| Constitution | Secondary | 14–15 | Concentration checks; Amulet of Greater Health covers endgame |
| Dexterity | Tertiary | 14 | AC in humanoid form; Gloves of Dexterity can set to 18 in Act 2 |
| Strength | Dump | 8 | Wild Shape overrides with the form’s own STR — your base stat is irrelevant in beast form |
Best race picks:
- Wood Elf (recommended): +1 WIS, +1 DEX, Darkvision, Stealth proficiency, +5 ft. movement speed — the movement bonus transfers to most Wild Shape forms, which matters when repositioning as a Large beast
- Halfling (concentration optimizer): Reroll 1s on attack rolls and saving throws — every failed Concentration check that rolled a 1 becomes a reroll, practically eliminating the worst-case outcome
- Gold Dwarf (durability): +1 HP per level and poison resistance — straightforward survivability with no downside for this playstyle
Background: Outlander (Athletics + Survival proficiencies) covers the physical checks you’d normally fail with WIS-primary ability scores.
Key Spells Per Act
Moon Druid isn’t just a shapeshifter — the correct pre-combat spell sets up every fight before you transform.
Act 1 (Levels 1–4): Spike Growth, Healing Word, Faerie Fire, Longstrider (whole-party at camp for free before each major fight)
Act 2 (Levels 5–8): Moonbeam (Bonus Action to reposition each turn), Sleet Storm (area lockdown, no Concentration contention), Plant Growth (no Concentration, half-movement zone), Conjure Woodland Being (Level 7 — Dryad casts free Spike Growth)
Act 3 (Levels 9–12): Conjure Elemental, Call Lightning (ongoing damage while shifted), Mass Cure Wounds (emergency only), Heroes’ Feast (Markoheshkir covers this for free)
The Dryad-plus-your-Spike-Growth combo at Level 7+ is underused: two overlapping Spike Growth zones cover the same ground. Enemies with limited movement who can’t route around one field step through both, taking double ticks per move action. This pairs with Sleet Storm (which prevents running entirely) for effectively zone-locked enemies.
Frequently Asked Questions
Can Moon Druid cast spells while Wild Shaped?
No — spellcasting isn’t available in beast form. The correct workflow: cast your concentration spell (Action), then Wild Shape as a Bonus Action. Concentration spells like Spike Growth stay active while you’re shifted because you cast them before transforming. To cast a new spell mid-fight, use Dismiss Wild Shape (free action) → cast → optionally re-shift next turn as a Bonus Action.
Tavern Brawler or War Caster at Level 4?
Tavern Brawler at Level 4, War Caster at Level 8. TB adds raw damage to every Wild Shape attack from the moment you take it at Level 4 — the return is immediate and scales with every level. War Caster protects Concentration spells, which matters more in Act 2 and Act 3 when enemies are dealing significant damage per hit and you’re holding longer encounters. Both are correct — just in order.
Does Earth Myrmidon’s Tavern Brawler bonus apply to its thunder damage rider?
Yes, as of Patch 8. The STR modifier bonus from Tavern Brawler now applies to elemental damage riders on Wild Shape attacks while shapeshifted, including the Earth Myrmidon’s thunder strikes. Larian has flagged this as unintended behavior, so it may be patched — verify in-game if you’re on a later patch.
What’s the best multiclass dip for Moon Druid?
Fighter 1 (after Level 10 Druid) adds CON saving throw proficiency for Concentration and the Defence fighting style for +1 AC in humanoid form. War Cleric 1 adds access to Sanctuary — cast it, then reposition your Moonbeam, and the Sanctuary drops only when you attack rather than when you cast the Moonbeam movement. See our BG3 Cleric build for a full breakdown of War Cleric’s subclass features if you’re considering that dip. These are quality-of-life improvements, not damage multipliers. A pure Level 12 Druid remains fully competitive and simpler to manage.
Sources
- Circle of the Moon — bg3.wiki
- Wild Shape — bg3.wiki
- Wild Shape: Bear — bg3.wiki
- Wild Shape: Owlbear — bg3.wiki
- Wild Shape: Earth Myrmidon — bg3.wiki
- Tavern Brawler — bg3.wiki
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