Sword of the Occult/Mejai's Soul Stealer and executions.
With the greater impact dying will have on SotO, I think that executions should no longer remove stacks. More often than not, executing is done to provide a better out than giving up a proper kill, and represents a good decision made on the part of the player; punishing it by removing even more stacks than are currently lost just makes an underused item even less attractive.