Syrix, Carrier of the Flame + Skyfire Phoenix + Ashnod's Altar + Pitiless Plunderer

Syrix, Carrier of the Flame

Skyfire Phoenix

Ashnod's Altar

Pitiless Plunderer

How it works

1. Activate Ashnod's Altar by sacrificing Syrix, adding CC.
2. Choose not to move Syrix from your graveyard to the command zone.
3. Syrix dies, triggering Pitiless Plunderer, creating a Treasure token.
4. Activate Ashnod's Altar by sacrificing Skyfire Phoenix, adding CC.
5. Skyfire Phoenix dies, triggering Syrix and Pitiless Plunderer.
6. Resolve the Pitiless Plunderer trigger, creating a Treasure token.
7. Activate both Treasure tokens by tapping and sacrificing them, adding .
8. Resolve the Syrix trigger, causing you to pay 2 to cast Syrix from your graveyard.
9. Skyfire Phoenix triggers, returning itself from your graveyard to the battlefield.
10. Repeat.