The core an average campaign bosses close each area: the Giant (Forest), the Piloted Hearth Monarch (Dwarven Mines), the Scientist (Sewer) and the Bone Drake (Dungeon), which is the current final boss. Optional bosses such as Devilman (Dante), Baby, Mr. Bones and The Master behind A Dark Mirror appear through Dungeon encounters. The Drake's Skull is not a Bone Drake drop; it is an accessory from the Challenger II achievement.
This page uses the official Trello (last edited April 2026), the Roblox game page and player-documented notes for Alpha v0.5.1, checked on October 20, 2026. HP figures are solo values from community notes. AAC is in Alpha and changes often; where the Trello and newer notes disagree, we give the newer value.
01
All bosses at a glance
| Boss | Where | Notable mechanics | Drops/rewards |
|---|---|---|---|
| Giant | Forest, stage 8 | 90 HP; party-wide Fear | Dominating Soul; Thick Hide boon, Elf race |
| Piloted Hearth Monarch | Mines, stage 7 | 129 HP; Mountain Shaker every 3 turns | Mechanical Soul; Dwarf race |
| Scientist | Sewer, stage 5 | Takes 0.1x damage while an ally lives | Decaying Soul (Mutated Rat Ogre) |
| Bone Drake | Dungeon, stage 12 | 235 HP; big AoE every 6 turns | Necrosis Core, 115 gold, 306 XP |
| Devilman (Dante) | A Challenger in the Dark | 166 HP; true-damage Jackpot! | Defiant Soul; Daredevil Impulse |
| Baby | A Strange Aura | 169 HP; 67 damage to all on turn 1 | Chaotic Soul; The Pinnacle |
| Mr. Bones | The Prisoner | 200 HP; mass Crippled | Decrepit Soul; Wild Ride |
| The Master | A Dark Mirror | 155 HP; extra lives | Master's Giftbox; Withered route |
| Herald of The Void | Portal in the Dungeon | 200 HP; cannot miss | Invader's Soul; Voidscorched |
| The Collector | After a Den bounty | 230 HP; steals gold and buffs | Collector's Business Card |
| Grandmaster Knight Peranil | Mines, Intimidating Divinity | 135 HP; heals 20% max HP | Black Shield Chippings; Incandescence |
| Shard of Miiter | Sewer, Cult Ritual | 180 HP; random extra energy | Purified Shard of Chaos; Chaotic Accolade |
Souls craft boss gear (see items), and achievement boons still have to be bought for Cealts, as the boons page explains.
02
Area bosses: Giant, Hearth Monarch and Scientist
Giant. The Trello card says he usually opens with Pummel, which Cripples. Roar is an undodgeable party-wide Fear and Skewer can be neither dodged nor missed. He is the easiest boss for Taking Your Sweet Time (win after 12+ turns, unlocks Overtime).
Piloted Hearth Monarch. The Mines are an optional Forest sub-area reached by fighting the Dwarves in the Elven Camp encounter. The boss gains Steam with each move and needs 8+ Steam for Mountain Shaker.
Scientist. The Sewer is a Dungeon sub-area entered through the Ominous Manhole. The Scientist heals allies and summons Toxic Ratkin, so clear his side first. Community notes pair him with a Rat Ogre and a Mutated Rat Ogre, which gains 10% resistance to every damage type that hits it (up to 50%), so mixed damage works better.
03
Bone Drake: the final boss
As of v0.5.1, the Bone Drake at Dungeon stage 12 is the final boss of the main campaign. The Trello card for its Necrosis Core says the item's use will come with "Area 3".
Player notes for v0.5.x list:
- Dreadlord's Call on turn 1: Banefire, Poison and Fear on the whole party, unavoidable.
- Necregenesis: 22 necrotic damage to everyone on turn 6 and every 6 turns after.
- Beckon the Beyond summons a Blackened Skeleton.
The November 2025 Trello card listed 180 HP, 25% block and different moves; v0.5.x notes list 235 HP and 5% block. Achievements that end here include Dragonslayer (Death's Dance boon) and Cycle of Death (Withered race).
04
How to get the Drake's Skull
The Drake's Skull accessory unlocks with Challenger II: complete the Dungeon with a Cealt multiplier of 2x or higher.
- Pick positive (green) Game Modifiers before the run. Community notes say their bonuses add up, so you need about +100% Cealt gain.
- Skip negative (red) modifiers. They cut Cealt gain and disable achievements.
- Clear the Forest or Mines, then the Dungeon through the Bone Drake. The first half at 2x also earns Challenger I.
The biggest green modifiers give +20% each: Towering Forces, Glass Soul and Surprise Round. Community notes list the skull at 100 Cealts. The Legacy Bone Drake accessory is different: it only went to players who joined on October 10, 2026.
05
Dungeon and Mines mini-bosses
Community notes say optional Dungeon bosses can appear from stage 3 of 12, The Master from stage 4.
- Devilman (Dante): the Trello says the fight has its own music and mostly single-target damage, so a taunt helps.
- Baby: most effects you apply get copied onto every player, and it can dodge "undodgeable" attacks. Start at full HP.
- Mr. Bones: open the cell with a Mysterious Key (it works from your stash) or let a Rogue pick the lock. The Trello rates him harder than the Bone Drake.
- Herald of The Void: use a Summoning Star, resist the voices, beat the Void Beings, then the Herald. Accepting the mark skips the fight; the Trello listed -10 Max HP for it, newer notes say -20% max HP.
- The Den: bounties send you after Raphne, Antonio Seven Scales or Mizukari; two in one run unlocks the Nyvari race. After a bounty you can attack the Collector.
- Grandmaster Knight Peranil, the Mines paladin, fights only if you assault him. Resting beside him heals 40% max HP and cleanses 1 Exhaustion.
06
A Dark Mirror: The Master and the Withered race
Touch the blackened mirror and you land in an old man's study. When The Master should die, he heals to full on his next turn and loses a life: two extra lives for one to three players, three for bigger groups. Patch 0.5.1.3 made that healing impossible to reduce.
Afterward he offers a deal. Accepting gives Claimed Soul for the run (0.5x healing received, 1.1x ability damage taken). Beat the Bone Drake in that same run for Cycle of Death, which unlocks the Withered entry on our races page.
07
Timestream and limited-event bosses
The Timestream Entanglement One-Shot (v0.5.0, August 2026) is a side campaign that community notes call the only event that is not limited-time; see events.
- The Snatcher: after losing 20% HP it marks itself; deal 20% of its max HP to cancel The Snatchening.
- The Duelist: incoming damage drops to 1 until ability hits strip its stacks.
- Aion: the final boss, able to act twice a turn. On the true-ending route he costs every player a level each turn; anyone at level 0 dies.
The "Ohio Final Boss" was an April Fools 2026 fight and is now unobtainable.
08
Boss rush achievements and practical tips
Boss Rush: Dungeon asks for four Dungeon bosses or mini-bosses in one run. The Trello lists Baby, Mr. Bones, Devilman and Bone Drake; v0.5.x notes also count The Master and The Collector.
Party scaling. The Party Scaling card says each extra member adds 35% enemy HP and 12.5% damage. Newer notes say bosses get +70% HP per member: the Bone Drake has 235 HP solo and 893 with five.
Exhaustion. Each death in combat adds a stack: -15% max HP, -20% damage and -20% outgoing healing, up to 3 stacks. Resting removes one, and beating an area boss also clears it. Editorial tip (Alpha v0.5.1, October 2026): rest before optional bosses so a death there does not weaken your Bone Drake attempt. New players should start with the beginner guide.
09
FAQ
How do you get the Bone Drake skull in An Average Campaign?
Earn Challenger II by clearing the Dungeon with a 2x or higher Cealt multiplier. The Bone Drake itself drops the Necrosis Core.
Who is the final boss in An Average Campaign?
The Bone Drake at Dungeon stage 12, as of v0.5.1. The Timestream side campaign ends with Aion.
Where is the Dark Mirror boss?
Inside the A Dark Mirror encounter in the Dungeon. Touch the mirror and talk to the old man.
Who is Dante in AAC?
Dante is the Devilman from A Challenger in the Dark. Beating him unlocks the Daredevil Impulse boon.
Is there an Ohio final boss?
Only during April Fools 2026. It and its Robloxian race are no longer obtainable.