Zeus, King of the gods

Shock-when this creature deals damage to another
target creature that would die this turn, instead put three shock counters on that
creature. At the beginning of their upkeep remove one
counter from that creature and deal {3} damage to target creature/planeswalker.
When this creature enters the battlefield, it deals {x} damage to any target where {x} is the amount
you payed when casting this spell.
Pay {p/u}{p/u}, this creature deals {7} damage to any
target.