Lich's Mastery, Isochron Scepter, and Final Fortune

Prerequisites

• Lich's Mastery on the battlefield
• Isochron Scepter on the battlefield
• Final Fortune in exile
• each turn available

Steps

1. Activate Isochron Scepter by paying , casting a copy of Final Fortune without paying its mana cost
2. Resolve Final Fortune, taking an extra turn after this one
3. Repeat each turn
4. At the beginning of each extra turn's end step, Final Fortune triggers to cause you to lose the game, but you cannot lose the game due to Lich's Mastery

Results

• Infinite turns