When Gantrithor enters the battlefield, put a number of +1/+1 counters on it equal to the amount of mana spent to cast it.

Whenever Gantrithor would be dealt damage, remove that many +1/+1 counters from it instead.

{6}, {T}, Exile Gantrithor and any number of nontoken Protoss creatures you control with at least one white mana symbol and one black mana symbol in their combined mana costs: Destroy target land an opponent controls. Then destroy each artifact and creature that player controls. Then Gantrithor deals damage equal to is power to that player. Activate only as a sorcery and only if Gantrithor is a creature.

Crew 4