Heiko Yamazaki, the General + Coretapper + Magistrate's Scepter

Heiko Yamazaki, the General

Coretapper

Magistrate's Scepter

How it works

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 by tapping it and removing three charge counters from it, causing you to take an extra turn after this one.
4. Move to your combat phase.
5. Declare any Warrior or Samurai you control as an attacker with no other attackers.
6. Heiko triggers, allowing you to cast Coretapper from your graveyard this turn.
7. Cast Coretapper from your graveyard by paying 2.
8. Move to your next turn.
9. Repeat.