Requires

Halana, Kessig Ranger must be on the battlefield. Ashnod's Altar must be on the battlefield. Polyraptor must be on the battlefield. You have a way to cause a creature to enter the battlefield under your control. Mana needed:

Steps

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

Results