Acid Shells

Acid Shells is a mod for the Sobek shotgun, that causes enemies killed by the weapon to explode, dealing damage (increased by a percentage of their maximum health) in an area around them.

Acquisition

 * This mod can be obtained by killing the boss Kela De Thaym during the Operation: Rathuum event.

Tips

 * Due to the nature of this mod, prioritizing targets is a must: killing heavy units first will result in other enemies taking damage or dying due to the resulting explosion, reducing the time to kill entire crowds significantly.
 * Modding the Sobek for or  damage and punch through can be a good idea: while shooting you can soften up enemies with procs before the explosion occurs, thus amplifying the damage inflicted by acid shells' burst, this is mostly effective at high levels
 * Against the infestation, this mods scales tremendously well, since most of them have plain HP without armor

Trivia

 * The Executioner mods were the second series in Warframe to primarily feature enemies on the mod card, instead of a Warframe or player-controlled Companion.