Shared Pain

Enchant creature
Whenever enchanted creature is dealt combat damage, its controller may pay {u/r}. If they do, Shared Pain deals that much damage to each player. When enchanted creature dies, Shared Pain's controller may pay {u/r}. If they do, return Shared Pain to its owner's hand.
"Wha-? Don't think that I like pain or anything.
It's not masochism, it's stra-te-gy!" - Kuro