I am currently running a gish counterattack character and am about 5 or6 floors down when I was struck with a debuff: Missing Right Arm. it is -20 crit chance and melee damage and -40 counter. I have tried potions of purity and several wands but it has no time out and no way of fixing itself. This completely ruins my character and my run. I am running Wild Magic in my build and have both escrII and ascii invasion turned on (and several skill mods but beyond advanced craft and smelt nothing that affects rooms or the like. How does this debuff work and how can I get rid of it?
Ascii invasion introduces some pretty nasty things. You'll need a replacement arm from a monster (don't remember which) to fix it. Same goes if you lose a leg.
I'm pretty sure that you have to attack monsters in melee in order to remove the buff (not a specific number of monsters mind you; a chance of removing the buff on each attack). Or else you can drink lots of polymorph potions and hope one of them spawns a new leg.