"Until end of turn, whenever a creature you control is dealt damage by a source an opponent controls, that creature deals that much damage to that opponent."
If you want your own sources to trigger it..."Until end of turn, whenever a source deals damage to a creature you control, that creature deals that much damage to that source's controller."
"Until end of turn, whenever a creature you control is dealt damage by a source an opponent controls, that creature deals that much damage to that opponent."
ReplyDeleteIf you want your own sources to trigger it...
Delete"Until end of turn, whenever a source deals damage to a creature you control, that creature deals that much damage to that source's controller."