Tameshi, Reality Architect, Coretapper, and Magistrate's Scepter

Prerequisites

• Tameshi, Reality Architect on the battlefield
• Coretapper on the battlefield
• Magistrate's Scepter on the battlefield
• Coretapper does not have summoning sickness
• You control at least one land
• each turn available

Steps

1. Activate Coretapper's first ability by tapping it, putting a charge counter on Magistrate's Scepter
2. Activate Coretapper's second ability by sacrificing it, putting two charge counters on Magistrate's Scepter
3. Activate Magistrate's Scepter by tapping it and removing three charge counters from it, causing you to take an extra turn after this one
4. Activate Tameshi's second ability by paying and returning a land from the battlefield to your hand
5. If it has not triggered this turn, Tameshi's first ability triggers, causing you to draw a card
6. Resolve Tameshi's second ability, returning Coretapper from your graveyard to the battlefield
7. Play any land from your hand
8. Move to your next turn
9. Repeat

Results

• Infinite turns