Verified on Patch 8 (final patch). No Druid subclass changes were made in Patch 8—all mechanics below are current.
Halsin joins your party as a Level 1 Druid—even though the first time you met him he was a Level 5 bear tearing goblins apart. That forced reset trips up a lot of players. It’s actually an opportunity: you get to choose his subclass from scratch, and Circle of the Moon turns him into the most durable frontline tank you can build without burning a player slot on a dedicated warrior class.
This guide covers three things most Halsin guides skip: the exact Act 2 recruitment chain you’ll lose him to if you rush it, the Moon Druid vs Spore Druid debate resolved with specifics, and a Myrmidon form guide for Act 3 that tells you which elemental form wins each boss fight and why.
Quick Start: Halsin in 5 Steps
- Act 1: Defeat all three goblin leaders (Priestess Gut, Minthara, Dror Ragzlin) to free the Emerald Grove—Halsin joins your camp but isn’t permanent yet.
- Act 2: Complete the three-step Shadow Curse quest (see below) before moving to Act 3, or you permanently lose him.
- Subclass: Pick Circle of the Moon immediately—the bonus action Wild Shape is too valuable to delay.
- Feats: War Caster at Level 4, Tavern Brawler at Level 8 (requires bumping STR to 17 first).
- Act 3 default form: Earth Myrmidon at Level 10—103 HP, physical attacks, and the only Myrmidon that benefits from Tavern Brawler.
How to Recruit Halsin: The Act 2 Gate Most Players Miss
Halsin is available from Act 1, but he doesn’t become a permanent companion until you complete his Shadow Curse quest in Act 2. If you travel to the Rosymorn Monastery Trail or otherwise trigger the Act 3 transition without finishing this chain, Halsin leaves your party permanently. There’s no way to get him back [4].
Here’s the exact sequence:
Step 1: Wake Art Cullagh
At Last Light Inn in the Shadow-Cursed Lands, you’ll find Art Cullagh in a catatonic state. To wake him, you need the Battered Lute, found in the House of Healing—guarded by Malus Thorm. Return the lute to Cullagh, who wakes and tells you about Thaniel, prompting Halsin to act [4].
Step 2: Defend the Shadowfell Portal
Meet Halsin at the lakeshore north of Last Light Inn. He enters a dimensional portal to rescue Thaniel’s essence from the Shadowfell. Your job: keep the portal intact for four full turns while waves of shadow creatures assault it. The portal has limited HP. Focus your entire party on crowd control—Thunderwave, Entangle, Hold Person—anything that stops enemies from attacking the portal. Halsin returns automatically after four turns and becomes a permanent companion from this moment onward [4].
Step 3: Reunite Oliver
Find the strange boy Oliver at the House of Flowers (marked as “House in Deep Shadows” on the map). He retreats to Reithwin Town inside a Nightdome barrier. Defeat his summoned allies to collapse the shield, then choose dialogue options that convince Oliver to reunite with Thaniel. This completes the Shadow Curse arc and Halsin’s recruitment [4].
With Halsin in your permanent roster, open his level-up screen. He starts at Level 1 with STR 10, DEX 14, CON 14, INT 8, WIS 17, CHA 12—standard Druid array, exactly what you’d expect. His Wisdom of 17 is already strong; that becomes the foundation of the build [1].
Moon Druid vs Spore Druid: Which to Pick at Level 1
Most guides say “go Moon Druid” and move on. Here’s why that’s right, and the specific scenario where Spore Druid wins instead.
Why Moon Druid Wins for Halsin in Most Parties
The defining feature of Circle of the Moon is Combat Wild Shape, which lets Halsin transform as a bonus action rather than a full action [2]. In practice this means: turn 1, cast Spike Growth (action) then Wild Shape into Cave Bear (bonus action). A regular Druid has to choose between the two. Moon Druid does both.
The other Moon Druid advantages compound as Halsin levels:
- Lunar Mend (Level 2): Spend a spell slot as a bonus action to recover 1d8 HP per slot level while shifted. This extends Wild Shape duration through long fights without needing to unshift.
- Primal Strike (Level 6): Beast attacks count as magical, overcoming resistance and immunity to non-magical physical damage—relevant against shadow creatures in Act 2 and several Act 3 enemy types.
- Sabre-Toothed Tiger (Level 8, Moon exclusive): Shreds armor as a passive on attacks and regenerates HP. The armor reduction stacks with other debuffs and is particularly effective against high-AC Act 3 enemies [2].
- Elemental Myrmidons (Level 10, Moon exclusive): 90–103 HP elemental forms with specialized toolkits. These are the endgame Wild Shape pool and the reason Moon Druid pulls ahead of every other Druid subclass in Act 3 [2].
When Spore Druid Is the Right Call
If your active party already has a dedicated tank (Lae’zel, a Fighter, a Paladin) and you want Halsin to contribute as a support caster and summon battery, Circle of Spores opens a different toolkit [3]:
- Animate Dead (Level 5 circle spell) lets Halsin raise corpses from every fight, compounding your summon count without using Concentration.
- Fungal Infestation (Level 6) raises a Fungal Zombie from any beast or humanoid corpse as a reaction—4 times per long rest.
- Cloudkill (Level 9 circle spell) is one of the strongest Concentration battlefield control tools in the game.
- Symbiotic Entity gives Halsin 4 HP per druid level as temp HP and adds 1d6 necrotic damage to his weapon attacks—useful when he’s playing melee caster rather than tank [3].
The tradeoff: Spore Druid gives up the bonus action Wild Shape. Every shift costs Halsin his full action. At the level range you’ll be playing through Act 3, that action economy loss is significant. Moon Druid is the default recommendation; Spore Druid is the right choice only when the rest of your team handles frontline pressure entirely.
For a deeper Spore Druid breakdown, see our Spore Druid build guide.
Ability Scores, Feats, and the Level Roadmap
Ability Score Priority
Halsin’s companion stats at Level 1: STR 10, DEX 14, CON 14, INT 8, WIS 17, CHA 12 [1].
For Moon Druid, prioritize in this order: Wisdom → Constitution → Strength.
Wisdom governs spellcasting (spell attack bonus, spell save DC) and will be the score you’ll boost first. Constitution raises concentration check success rates and raw HP. Strength matters once you take Tavern Brawler at Level 8—the feat adds your STR modifier to Wild Shape attack and damage rolls, so investing a few points first is worth it.
Feat Roadmap
| Level | Choice | Why |
|---|---|---|
| 4 | War Caster or +2 WIS | War Caster gives advantage on Concentration saves—critical for Spike Growth and Moonbeam. If you rarely run Concentration spells on Halsin, take the ASI instead and go WIS 19. |
| 8 | Tavern Brawler (after bumping STR to 17) | Adds +3 STR modifier to every Wild Shape attack and damage roll. Works on Cave Bear, Owlbear, and Sabre-Toothed Tiger. Does not work on Fire, Water, or Air Myrmidons—Earth Myrmidon is the only elemental form that benefits [6]. |
| 12 | +2 WIS → 20 WIS | Caps spellcasting modifier. Less impactful if Halsin spends most fights shifted, but Healing Word range and Moonbeam DC both improve. |
Note on STR investment: Tavern Brawler is worth taking but requires Halsin to reach at least STR 17 for a +3 modifier. Bump STR via an ASI before Level 8 if you want the full return. At STR 18 (Earth Myrmidon’s native score), Tavern Brawler adds +4 to both attack and damage rolls on every hit.
Wild Shape Progression by Level
These are Halsin’s significant form unlocks as a Moon Druid, with the game-level gate and the strategic context for each [2]:
| Druid Level | Key Form(s) | When It Matters |
|---|---|---|
| 2 | Cave Bear (30 HP, Goad) | Your default tank form throughout Act 2. Goad forces enemies to target Halsin instead of squishy party members. |
| 4 | Dire Raven (blind) | Moon exclusive. Utility form for blinding high-priority enemies, then dropping out to shift into a fighting form next turn. |
| 6 | Owlbear, Panther + Primal Strike | Owlbear is the first form with the size and HP pool to anchor a fight. Primal Strike (magical attacks) means you stop bouncing off shadow creature resistances. |
| 8 | Sabre-Toothed Tiger (Moon exclusive) | Armor-shredding passive makes it the best sustained-damage form before Myrmidons. Ideal against armored bosses in late Act 2 and early Act 3. |
| 10 | Earth, Air, Fire, Water Myrmidons (Moon exclusive) | Each costs 2 Wild Shape charges. 90–103 HP pools. Your Act 3 endgame toolkit—choose by encounter (see next section). |
Wild Shape HP pools also scale with druid levels—every two levels, each form gains additional HP. A Level 10 Cave Bear has substantially more HP than the same form at Level 2 [2].
Act 3 Myrmidon Guide: Which Form Wins Each Fight
At Level 10 Halsin unlocks four Myrmidon forms. Each costs 2 Wild Shape charges, so you get one Myrmidon transformation per short rest unless you have charge-restoring items. Choosing the right one per encounter is the difference between Halsin soloing a wing of Wyrm’s Rock and Halsin spending the fight dead on the floor.
Earth Myrmidon (103 HP) — Your Default
Highest HP of the four forms. Physical attacks (Muck to Metal, Sludgy Sling, Burrow) benefit from Tavern Brawler—the only Myrmidon that does [6]. STR 18 native score means a Tavern Brawler Halsin adds +4 to every Earth Myrmidon attack and damage roll. Use this form for:
- Raphael: Fully fire immune, resistant to lightning, cold, and poison. Earth Myrmidon’s physical attacks ignore all of that. Fire Myrmidon does zero damage here.
- Steel Watchers (Honour Mode): Normal difficulty Steel Watchers are lightning-vulnerable, but Honour Mode removes that vulnerability and makes them fire-resistant. Earth Myrmidon is the safe choice regardless of difficulty.
- General Act 3 combat: When you don’t know the enemy’s elemental profile, Earth Myrmidon’s physical damage rarely gets resisted.
Fire Myrmidon (90 HP) — Glass Cannon for Non-Immune Enemies
Scorching Strike and Immolation deal strong fire damage against enemies without fire resistance. Cazador is not fire immune, making Fire Myrmidon viable there. Skip entirely against Raphael and devil-type enemies who resist or absorb fire [2].
Air Myrmidon (90 HP) — Wet Encounter Specialist
Electrified Flail deals lightning damage. Enemies afflicted with the Wet condition (from rain spells, water surfaces, or Water Myrmidon’s Explosive Icicle) become vulnerable to lightning, doubling Air Myrmidon’s damage output. Tavern Brawler does not apply to Air Myrmidon, so this form only outperforms Earth Myrmidon when Wet synergy is active [6].
Water Myrmidon (90 HP) — Emergency Healer
Healing Vapours lets Halsin heal allies from inside a Myrmidon form—normally impossible in Wild Shape. Hiemal Strike deals cold damage and inflicts Wet (setting up Air Myrmidon chain if you’ve got another shifted Druid). Use Water Myrmidon when your healer is down and you need emergency healing while maintaining frontline pressure [2].
Decision Tree
- Enemy fire immune? → Earth Myrmidon
- Enemy in or near water / Wet condition active? → Air Myrmidon (with Tavern Brawler caveat)
- Party healer dead or concentrated elsewhere? → Water Myrmidon
- Non-immune enemy, maximum damage needed? → Fire Myrmidon
- No specific elemental profile / want TB bonus? → Earth Myrmidon
Act 3 Equipment
Most equipped items don’t transfer to Wild Shape form. The exception is armor—Halsin’s armor properties persist while shifted, which makes the right armor slot crucial.
| Slot | Item | Where to Get | Why |
|---|---|---|---|
| Armor | Armour of Moonbasking | Lower City Sewers (X:−157, Y: 939), sold by Voiceless Penitent Bareki for 1,400 gold [5] | +22 temp HP on every Wild Shape entry, +2 AC, advantage on spell saves, and 1 damage reduction while temp HP holds. The best armor in the game for Moon Druid. |
| Ring 1 | Shapeshifter’s Boon Ring | Strange Ox (Emerald Grove Act 1, Last Light Inn Act 2, or Rivington quest reward Act 3) [7] | +1d4 to all ability checks while shapeshifted. Useful for grapple checks and Athletics contests in Wild Shape. |
| Weapon | Any +WIS Quarterstaff | Act 3 merchants in Baldur’s Gate | Halsin’s spellcasting (Spike Growth, Call Lightning, Healing Word DC) scales entirely with Wisdom. Any staff that boosts WIS or spell attack rolls improves his out-of-form turns. Ring of Spellcasting and similar accessories follow the same logic. |
Spells for Out-of-Form Turns
Moon Druid Halsin will spend the majority of combat shifted. When all Wild Shape charges are spent or a fight requires caster work, these are his best contributions:
- Healing Word (bonus action): Revive or top up a low-HP ally from range. Use this when Halsin is out of form and can still contribute support without committing his action.
- Spike Growth (concentration, Level 2): Cast before shifting—Moon Druid’s bonus action Wild Shape means Halsin can drop Spike Growth with his action and then shift in the same turn. The terrain persists and damages anything that moves through it.
- Call Lightning (concentration, Level 3): Strong single-target repeated damage. Cast it, then shift into an Owlbear or Tiger while the storm handles ranged pressure.
- Conjure Woodland Being (Level 4): Summons a Dryad who can summon her own tree ally. Two summons from one spell slot. Strong for fights where Wild Shape charges are limited.
Player-Type Guide
| Player Type | Subclass | Priority Feat | Default Form | Focus |
|---|---|---|---|---|
| New Player | Moon Druid | War Caster (L4) | Cave Bear → Owlbear at L6 | Let Goad do the work; cast Healing Word when your main party needs a top-up |
| Casual | Moon Druid | War Caster (L4), TB (L8) | Owlbear then Earth Myrmidon | Cast Spike Growth, shift, repeat. Earth Myrmidon for everything in Act 3. |
| Optimizer | Moon Druid | TB (L8 after STR 17) | Earth Myrmidon exclusively (Act 3) | Moonbasking armor, TB +4 on Earth Myrmidon, manage charges tightly across encounters |
| Summoner / Completionist | Spore Druid | +2 WIS (L4), War Caster (L8) | Symbiotic Entity + Animate Dead | Raise corpses each fight; stack Fungal Zombies; Cloudkill for crowd control |
FAQs
Can you recruit Halsin without losing Minthara?
In standard playthroughs, recruiting Halsin requires you to oppose the goblin leaders—which is incompatible with siding with Minthara. Community Steam guides exist for getting both in Patch 7 via specific knock-out methods, but this involves significant quest complexity and risk. For a straightforward playthrough, treat it as either/or.
Does Halsin level up automatically in the party?
Yes. Once recruited, Halsin gains XP with the rest of your party. When you reach a level-up threshold, he levels alongside your main character. By the time most players enter Act 3, he’ll be Level 7–9 depending on how much optional content you’ve completed.
Is it worth using Halsin over Jaheira as a Druid companion?
Jaheira joins as a multiclassed Druid/Fighter and brings her own spells pre-selected. Halsin’s advantage is that you build him from Level 1—you choose his subclass, feats, and spell loadout from the ground up. For optimized Moon Druid combat, Halsin is the stronger choice. For a companion who arrives ready to go with a more varied kit, Jaheira is easier to use immediately.
Can Halsin use Tavern Brawler with Myrmidon forms?
Only with Earth Myrmidon. The feat explicitly excludes Fire, Water, and Air Myrmidon forms from receiving the Strength modifier bonus [6]. Earth Myrmidon’s physical attacks (Muck to Metal, Sludgy Sling) benefit fully—which is why it’s the default Act 3 form for a Tavern Brawler Halsin.
For more companion build guides, see our best companions guide and our full Moon Druid build guide if you want to run the same subclass on your main character. For a full overview of what every class brings to your roster, our BG3 best builds hub covers every subclass we’ve tested.
Sources
- Halsin — bg3.wiki
- Circle of the Moon — bg3.wiki
- Circle of Spores — bg3.wiki
- Lift the Shadow Curse — bg3.wiki
- Armour of Moonbasking — bg3.wiki
- Tavern Brawler — bg3.wiki
- Shapeshifter’s Boon Ring — bg3.wiki
I've been playing video games for over 20 years, spanning everything from early PC titles to modern open-world games. I started Switchblade Gaming to publish the kind of accurate, well-researched guides I always wanted to find — built on primary sources, tested in-game, and kept up to date after patches. I currently focus on Minecraft and Pokémon GO.