Fool's Demise, Coretapper, and Magistrate's Scepter

Prerequisites

• Fool's Demise on the battlefield
• Coretapper on the battlefield
• Magistrate's Scepter on the battlefield
• Coretapper does not have summoning sickness
• Fool's Demise attached to Coretapper
• 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
3. Fool's Demise goes to the graveyard from the battlefield as a state-based action
4. Both of Fool's Demises triggered abilities trigger
5. Resolve Fool's Demise's first triggered ability, returning Coretapper from your graveyard to the battlefield
6. Resolve Fool's Demise second triggered ability, returning it from your graveyard to your hand
7. Resolve Coretapper's ability from step 2, putting two charge counters on Magistrate's Scepter
8. Activate Magistrate's Scepter's second ability by tapping it and removing three charge counters from it, taking an extra turn after this one
9. Cast Fool's Demise by paying , targeting Coretapper
10. Repeat each turn

Results

• Infinite turns