Arilyn
Hero
Definitely mummy rot for me too. This is the one that gives me the creeps, not just my character!Mummy rot always got to me. For gruesomeness that is mechanically supported, I would go there. In terms of what just really hurts the player, level drain. Not gruesome technically, though some forms could be, but that makes players cringe as if something gruesome had occurred more than any kind of maiming or dismemberment.