|Can of Flavored Seltzer|
|Canned Dog Food|
|Extremely Skunky Beer|
In order to kill this mutant, you need to clean (with the tool given at the beginning of the mission) ALL the barrels in the room. Until ALL of them are cleaned (the tool has to be used 3 times on each barrel) the mutant is untouchable.
And, of course, while you're cleaning the barrels, which takes a while, YOU are NOT untouchable!
With a team, it is possible to "bounce" the boss between two or more people by having each player alternate cleaning the barrels. If done efficiently (drag the cleaning item to the hotbar) one can lower the amount of damage the mutant inflicts on players till the barrels are cleared.
Due to double name of mob in game, there is specification:
Huge Strange Mutant level 55 (Master) appears in Assault type of Blood Sports and hasn't loot.