Eternal Taskmaster + Coretapper + Magistrate's Scepter

Prerequisites

• Coretapper and Eternal Taskmaster do not have summoning sickness.
• An opponent cannot block and kill Eternal Taskmaster.

Steps

1. 1Activate Coretapper's first ability by tapping it, putting a charge counter on Magistrate's Scepter.
2. 2Activate Coretapper's second ability by sacrificing it, putting two charge counters on Magistrate's Scepter.
3. 3Activate Magistrate's Scepter's second ability by tapping it and removing three charge counters from it, taking an extra turn after this one.
4. 4Declare Eternal Taskmaster as an attacker.
5. 5Eternal Taskmaster triggers, causing you to pay to return Coretapper from your graveyard to your hand.
6. 6In your postcombat main phase, cast Coretapper by paying .
7. 7Repeat each turn.

Effects

• Infinite turns
• Lock