Grave Mistake
Ultra rare0.5%ObjectiveOptionalMulti-player
“Accidentally” kill a friend with your tombstone.
Multiplayer mischief: tombstones are throwable, and a thrown tombstone that lands the killing blow on a teammate (PvP on, health low) pops this. Coordinate it - friend stands still on a sliver of HP, you lob the gravestone, everyone laughs. "Accidentally", of course.