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Acid Shells is a Sobek.png Sobek-exclusive mod that causes enemies killed by the Sobek to explode, dealing a flat amount of DmgCorrosiveSmall64.png Corrosive damage plus a percentage of the enemy's maximum health as DmgBlastSmall64.png Blast damage in an area of effect.


Rank Flat Damage Percentage of Max Health Radius Cost
0 75 7.5% 2.5m 4
1 150 15% 5m 5
2 225 22.5% 7.5m 6
3 300 30% 10m 7
4 375 37.5% 12.5m 8
5 450 45% 15m 9


  • Explosion has linear damage falloff from 100% to 0% from the central enemy.
  • Explosion requires line of sight. Enemies can directly block other enemies from being affected.
  • The explosion itself cannot apply DmgCorrosiveSmall64.png Corrosive procs.
  • The explosion caused by Acid Shells can proc into itself and create another explosion on kill, creating a chain reaction that lead to very large areas being cleared in lower level missions.
  • Enemies killed by Acid Shells will have their corpses disintegrate, good for Stealth gameplay if silenced due to no bodies being left behind.


  • Due to the nature of this mod, prioritizing heavy units will result in other enemies taking high damage or dying due to the resulting explosion, reducing the time to kill entire crowds significantly.
  • Modding the Sobek.png Sobek for DmgCorrosiveSmall64.png Corrosive or DmgViralSmall64.png Viral damage and punch through can be effective to soften up enemies at higher levels with procs before the explosion occurs, thus amplifying the damage inflicted by Acid Shells' burst.
  • Against the Infested, this mod scales tremendously well since most of them have no armor.
  • Faction damage mods and RhinoIcon272.png Rhino's Roar130xDark.png Roar directly affect the mod's explosion damage.
    • In addition, abilities that increase damage on enemies or debuff them such as BansheeIcon272.png Banshee's Sonar130xDark.png Sonar, NovaIcon272.png Nova's MolecularPrime130xDark.png Molecular Prime, or SarynIcon272.png Saryn's Spores130xDark.png Spores can indirectly enhance it.
    • GarudaIcon272.png Garuda's SeekingTalons130xDark.png Seeking Talons will cause the explosions to apply DmgSlashSmall64.png Slash effects, which are considered Sobek damage and thus can trigger Acid Shells again on kill. Because this combo scales with enemy health and ignores armor, it remains effective at any level as long as the Sobek can still kill an enemy to start the reaction.
  • The aoe affects breakable containers as well, giving an effect similar to Looter as long as there are enemies around to proc the explosion.


  • Prior to Hotfix 18.10.6 (2016-05-06), this mod's polarity was Zenurik.
  • This mod, along with the other Executioner mods, are the second set mods to feature non-generic enemies on the mod card, the first being Mod TT 20px.png Vengeful Revenant.
  • At the time of Operation: Rathuum's announcement, this mod was referred to as Execution Shells, likely an earlier name for the mod. This initially caused confusion with players trying to look for the nonexistent mod.
  • The mod is used by Executioner Nok, although his version can remove armor.


Patch History[]

Update 22.20 (2018-05-17)

  • Fixed Acid Shells Mod causing Grineer Dropships to disappear.

Hotfix 20.2.3 (2017-04-19)

  • Fixed Infested Runners/Crawlers missing the Acid Shells FX when killed

Hotfix 19.9.2 (2017-02-07)

  • Fixed missing enemy death FX when using Sobek with Acid Shells as per: this thread

Hotfix 19.3.2 (2016-12-14)

  • Explosions on enemy death caused by Vulcan Blitz and Acid Shells mods will now properly alert enemies.

Hotfix 18.10.6 (2016-05-06)

  • Changed the Acid Shells to a Madurai polarity.

Update 18.10 (2016-04-29)

  • Introduced.