Don't use the weapon he's carrying?  So the better move would have been to sling his heavy bolter, pull out his bolt pistol, watch his squad bounce a bunch of bullets uselessly off the mitant's cover, the mutant toss a second grenade into his squad, and then take a shot into the vent with his bolt pistol, wounding but not killing the mutant who then tosses a third grenade before being killed?<br/><br/>Yes, maybe Darius could kill the mutant, with a pistol, in only one round if he was lucky, but you cannot count on luck.  I thought corruption was for stuff like being in the warp for too long and directly encountering a major demon, not using the weapon you have on hand to deal with a threat quickly before it can hurt your friends?<br/><br/>Are you really planning on giving Darius corruption every time he uses a heavy weapon to kill something in close range?  How many xp is that going to cost him each time?<br/><br/>If it's a one time thing because of the whole, getting drenched in mutant blood thing, that's one thing, but to impose a serious penalty everytime Darius uses his favorite weapon at close range?  Even to a target behind good cover?  That seems harsh.