Meren of Clan Nel Toth + Coretapper + Magistrate's Scepter

Prerequisites

• You have at least one experience counter.
• 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.
3. 3Meren's first ability triggers, giving you an experience counter.
4. 4Resolve Coretapper's ability, putting two additional charge counters on Magistrate's Scepter.
5. 5Activate Magistrate's Scepter's second ability by tapping it and removing three charge counters from it, causing you to take an extra turn after this one.
6. 6At the beginning of your end step, Meren's second ability triggers, returning Coretapper from your graveyard to the battlefield.
7. 7Repeat each turn.

Effects

• Infinite turns
• Lock