Rocket

Boss
Health
199/209 HPAlways 199. 209 from Ascension 8.
Gold
10075 goldAlways 100. 75 from Ascension 3.Always 75. 100 below Ascension 3.
Found in
Hivethe Kaiser Crab fight, 1 in 3 from the boss pool.
See fight
Part of
Kaiser Crab fightOne of its opening enemies.
Starts with
1 Surrounded
1 Back Attack
1 Crab Rage
attack3/4
199/199/209/209RocketSurrounded1Back Attack1Crab Rage1

Turn 1

How to beat Rocket

Surrounded

  • Surrounded: you face one arm at a time and take 50 percent more from the other arm.
  • Facing: a card or potion targeting an arm turns you toward it, so decide who to face each turn. Face Rocket on its Beam and Laser turns, and Crusher on Rocket's Reticle and Recharge turns.
  • Warning: Laser is the biggest single hit in the fight, and Charge Up before it is the tell.

Crab Rage and HP

  • Crab Rage cuts both ways: whichever arm dies first hands the survivor 6 Strength and a 99 Block wall.
  • Plan: bring both arms to low HP and finish them the same turn, or accept an enraged second phase and kill the one you fear more first.
  • Rocket: 199 HP (209 at Ascension 8+).

Notes

  • Boss encounter of Hive.
  • The tooltip text for Crab Rage says 5 Strength, but the code value is 6.
  • Surrounded turns you automatically when an arm dies and only one remains.
  • Recharge shows a sleep intent and does nothing.
  • The Reticle's tiny hit is the tell that a five-turn loop is starting.

From the code

Rocket is one half of the Kaiser Crab boss (the other is Crusher); the two halves share the Kaiser Crab art and fight together.

Changes by version

  1. 18 Jun 2026Bug fixv0.107.1
    Fixed Kaiser Crab appearing if you load into an already completed boss room, and its Rocket Claw charge-up SFX looping forever
  2. 21 May 2026Bug fixBeta branch
    Fixed Kaiser Crab's Rocket Claw's charge up SFX looping forever
  3. 19 Mar 2026HP189(199)199(209)Rage power Strength56Beta branch
    Claw; Charge Up move Strength gain now scales with Ascension with Ascension increased from 2 to 3; HP increased from 189 to 199 (199 to 209 with Ascension); Rage power Strength increased from 5 to 6
All 10 patch notes7 older
  1. 19 Feb 2026NumberInternal playtest
    Formerly Infested boss): big attack damage changed from 28 (30) to 31 and 35
  2. 21 Nov 2024RemovedInternal playtest
    Deprecated Rocket and Socket
  3. 31 May 2024ReworkInternal playtest
    Reworked Socket and Rocket
  4. 21 Jul 2023DamageInternal playtest
    Rocket/Socket Elite encounter moved to Act 3 and given health and damage buffs accordingly
  5. 16 Jun 2023DamageDazedInternal playtest
    Rocket/Socket attack changes. Double Swing attack changed to Big Swing attack: 4x2 to 10 damage and apply two Dazed
  6. 9 Jun 2023Bug fixInternal playtest
    Rocket and Socket elite encounter no longer gives double rewards
  7. 2 Jun 2023ChangeInternal playtest
    Rocket & Socket elite encounter reworked so Rocket is no longer a targetable enemy

Internal playtest notes are from before the Early Access release. Names and numbers in them can differ from the game today.

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