Djinn Illuminatus, Pact of the Titan, and Purphoros, God of the Forge

Prerequisites

• Djinn Illuminatus on the battlefield
• Pact of the Titan in hand
• Purphoros, God of the Forge on the battlefield

Steps

1. Cast Pact of the Titan choosing to pay its replicate cost an arbitrarily large number of times, paying a total of
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 the first Pact of the Titan, creating a 4/4 Giant creature token
4. When the Giant enters the battlefield, Purphoros triggers, dealing 2 damage to each opponent
5. Repeat from step 3 for each remaining Pact of the Titan

Results

• Infinite creature tokens
• Infinite damage
• Infinite ETB
• Infinite magecraft triggers