Does the mutator arena only unlock after

Finishing the Claptrap DLC?

yes, only after beating the whole thing.

■■■■ need new gear for the eclipse fight… and would have liked that to unlock sooner.

Why not just farm the usual suspects? The doggies in Subconscious for a Thunderfire, the Sentinel for grinder fodder etc.

havn’t got the sent yet… and RGNesus hates me right now… been farming for DAYS and have not had anything drop…

Denial Subroutine drops a guaranteed glitch weapon, very useful.