Metamorphosis Fanatic + Phyrexian Altar + Icewind Stalwart

Metamorphosis Fanatic

Phyrexian Altar

Icewind Stalwart

How it works

1. Cast Icewind Stalwart by paying its mana cost.
2. When Icewind Stalwart enters the battlefield, it triggers, targeting Metamorphosis Fanatic.
3. Holding priority, activate Phyrexian Altar by sacrificing Icewind Stalwart.
4. Resolve the Icewind Stalwart ability, blinking Metamorphosis Fanatic.
5. When Metamorphosis Fanatic enters the battlefield, it triggers, returning Icewind Stalwart from your graveyard to the battlefield.
6. Repeat from step 2.