Djinn Illuminatus + Pact of the Titan + Warstorm Surge

Djinn Illuminatus

Pact of the Titan

Warstorm Surge

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 the first Pact of the Titan, creating a 4/4 Giant creature token.
4. When the Giant enters the battlefield, Warstorm Surge triggers, dealing damage equal to the Giant's power to any target.
5. Repeat from step 3 for each remaining Pact of the Titan.

This explosive loop relies on Djinn Illuminatus to grant every instant and sorcery you cast the replicate ability equal to its mana cost. Because Pact of the Titan has a mana cost of {0}, its replicate cost is also {0}, allowing you to copy it an arbitrarily large number of times for free without spending any mana. As each resulting 4/4 Giant token enters the battlefield, Warstorm Surge triggers to translate every single token directly into lethal damage to any target of your choice.