Gravewaker + Coretapper + Magistrate's Scepter

Prerequisites

• Coretapper does not have summoning sickness.

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. 4Activate Gravewaker by paying , returning Coretapper from your graveyard to the battlefield tapped.
5. 5Repeat each turn.

Effects

• Infinite turns
• Lock