Prayer for Retribution

If a player dealt damage to you this turn, deal X
damage to that player where X is their devotion
to black. If that same player controls ten or more
black permanents deal an additional X damage to
him or her. If your devotion to white is ten or
more, deal an additional X damage to him or her.
"O' Righteous Father, with your help we shall punish
the wicked who worked their evil deeds upon us."
-Ish'ra, Protector-Angel