Elite Arcanist, Chakram Retriever, Pact of the Titan, and Warstorm Surge

Prerequisites

• Elite Arcanist on the battlefield
• Chakram Retriever on the battlefield
• Pact of the Titan in exile
• Warstorm Surge on the battlefield
• Elite Arcanist does not have summoning sickness
• It is your turn

Steps

1. Activate Elite Arcanist by paying and tapping it, casting a copy of Pact of the Titan without paying its mana cost
2. Chakram Retriever triggers, untapping Elite Arcanist
3. Resolve 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

Results

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