I tried the new Discord abilities this evening and corpses of creatures they are used on disappear. This includes bonded pets. First I used despair and tribulation seperately on wild creatures(bears) - corpses disappeared, then I tamed a wolf that was nearby and went back to the bonding gate - I bonded the pet and took it out of a guard zone and used despair on it. There was no ghost and no corpse. I then tamed a mongbat and repeated the bonding process. I used Tribulation on the mongbat once out of the guard zone, and then killed it with a spell. Again, no ghost and no corpse from a bonded critter.