Djinn Illuminatus + Pact of the Titan + Hammer of Purphoros

Djinn Illuminatus

Pact of the Titan

Hammer of Purphoros

How it works

1. Cast Pact of the Titan choosing to pay its replicate cost an arbitrarily large number of times, paying a total of 0.
2. Pact of the Titan's replicate ability triggers, causing you to copy Pact of the Titan for each time the replicate cost was paid.
3. Resolve all Pact of the Titans, creating an arbitrarily large number of 4/4 Giant creature tokens.
4. You may then move to your combat step, and use the infinite Giant tokens to deal infinite combat damage to each opponent.