Thorin, Mountain-king + Raphael, Ninja Destroyer + Nim Deathmantle + Yahenni, Undying Partisan

Thorin, Mountain-king

Raphael, Ninja Destroyer

Nim Deathmantle

Yahenni, Undying Partisan

How it works

1. Activate Yahenni by sacrificing Thorin.
2. When Thorin dies, Nim Deathmantle triggers, causing you to pay 4 to return Thorin from your graveyard to the battlefield and attach Nim Deathmantle to it.
3. When Thorin enters, it triggers, attaching Nim Deathmantle to Raphael, and then having Raphael deal 6 damage to itself.
4. Raphael triggers, adding six .
5. Resolve the Yahenni ability.
6. Repeat.