Since there is no solution i am going to add the updated objectives for this achievement here.
if anyone posts an actual solution i will gladly delete this.TobyPick On Your own (Shield) Size!
Absorb 20,000 damage with Force Field.Temper, Temper, TA-BOOM
Kill 10 enemies with Berg’s self-destruct mechanism.Rejection
Hit 250 enemies with Railgun rounds accelerated by Force Field.None Shall Pass
Detonate 50 Arc Mines with Toby’s custom Railgun.
(Helix upgrade 1
)Killing on Rails
Get a double-kill with Core Discharge. (toby's ultimate
) (It seems you have to get a double kill in PvP against other battleborn)
the Self destruct mutation unlocks at Character level 9.
thanks Sazpect for the update.