Infernal Vessel + Valkyrie's Call + Goblin Bombardment

Infernal Vessel

Valkyrie's Call

Goblin Bombardment

How it works

1. Activate Goblin Bombardment by sacrificing Infernal Vessel.
2. When Infernal Vessel dies, it triggers, returning itself from your graveyard to the battlefield as a Demon in addition to its other types.
3. Resolve the Goblin Bombardment ability.
4. Activate Goblin Bombardment by sacrificing Infernal Vessel.
5. When Infernal Vessel dies, Valkyrie's Call triggers, returning Infernal Vessel from your graveyard to the battlefield as an Angel in additional to its other types.
6. Resolve the Goblin Bombardment ability.
7. Repeat.