I was pondering the idea of cursed armor and I thought since it was caled cursed maybe evil shaman should have some sort of ability to actually curse armor. After some more pondering I came up with this idea which is along those lines.

Curse of Black Hand

Those who have been cursed by the black hand have an extremely difficult time unclenching their hands. As a result they cannot discard things from their hands and may find manipulating other items on their person difficult or impossible.

affects
This works kind of like a forced iron grip in that under its effects the afflicted cannot remove help items and weapons. It also makes it very difficult to drop or get things as well as opening/locking/unlocking doors. I think it should also be difficult to quaf potions and pretty much anything that requires using fingers. I would make it somewhat akin to grease in the difficulty of manipulating items.

I feel shaman are all about having a variety of offensive tactics beyond straight damage and this could be more utility then just another stat loss skill.