Swift Warkite + Protean Raider + Ashnod's Altar

Prerequisites

• You attacked with a creature this turn.

Steps

1. 1Cast Protean Raider by paying , choosing to have it enter the battlefield as a copy of Swift Warkite.
2. 2When Protean Raider enters the battlefield, it triggers.
3. 3Holding priority, activate Ashnod's Altar by sacrificing Protean Raider, adding .
4. 4Resolve the Protean Raider trigger, returning Protean Raider from your graveyard to the battlefield as a copy of Swift Warkite.
5. 5Repeat from step 2.

Effects

• Infinite colorless mana
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers