Mishra, Eminent One, Ugin's Nexus, and Master Transmuter

Prerequisites

• Mishra, Eminent One on the battlefield
• Ugin's Nexus on the battlefield
• Master Transmuter on the battlefield
• Master Transmuter does not have summoning sickness
• , with available each extra turn available

Steps

1. At the beginning of your combat phase, Mishra triggers, creating a token copy of Ugin's Nexus that is a 4/4 Construct artifact creature named Mishra's Warform in addition to its other types
2. Activate Master Transmuter by paying , tapping it and returning Ugin's Nexus to hand, choosing not to put an artifact onto the battlefield
3. At the beginning of your end step, Mishra triggers, causing you to exile Mishra's Warform and take an extra turn after this one
4. Move to your next turn
5. Cast Ugin's Nexus by paying
6. Repeat

Results

• Infinite turns