Bishop of Rebirth, Coretapper, and Magistrate's Scepter

Prerequisites

• Bishop of Rebirth on the battlefield
• Coretapper on the battlefield
• Magistrate's Scepter on the battlefield
• Coretapper and Bishop of Rebirth do not have summoning sickness
• Opponents cannot block and kill Bishop of Rebirth

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's second ability by tapping it and removing three charge counters from it, taking an extra turn after this one
4. Declare Bishop of Rebirth as an attacker
5. Bishop of Rebirth triggers, returning Coretapper from your graveyard to the battlefield
6. Repeat each turn

Results

• Infinite turns