Darksteel Reactor + Dismantle + Eternity Vessel

Darksteel Reactor

Dismantle

Eternity Vessel

How it works

1. Cast Eternity Vessel.
2. Cast Dismantle targeting Eternity Vessel, destroying it and placing an amount of counters on Darksteel Reactor equal to the number of charge counters that were on Eternity Vessel.
3. Darksteel Reactor triggers, winning you the game.