Halana, Kessig Ranger + Ashnod's Altar + Polyraptor

Prerequisites

• You have a way to cause a creature to enter the battlefield under your control.

Steps

1. 1Cause a creature to enter the battlefield under your control.
2. 2Halana triggers, causing you to pay to have that creature deal damage equal to its power to Polyraptor.
3. 3Polyraptor triggers.
4. 4Holding priority, activate Ashnod's Altar by sacrificing Polyraptor, adding .
5. 5Resolve the Polyraptor trigger, creating a token copy of it.
6. 6When the Polyraptor token enters the battlefield, Halana triggers, causing you to pay to have the Polyraptor token deal damage equal to its power to itself.
7. 7Repeat from step 3.

Effects

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