Halana, Kessig Ranger, Ashnod's Altar, and Raptor Hatchling

Prerequisites

• Halana, Kessig Ranger on the battlefield
• Ashnod's Altar on the battlefield
• Raptor Hatchling on the battlefield
• You have a way to cause a creature to enter the battlefield under your control
• You have a way to give Raptor Hatchling indestructible
• available

Steps

1. Give Raptor Hatchling indestructible, if needed
2. Cause a creature to enter the battlefield under your control
3. Halana triggers, causing you to pay to have that creature deal damage equal to its power to Raptor Hatchling
4. Raptor Hatchling triggers, causing you to create a 3/3 Dinosaur creature token
5. When the Dinosaur enters the battlefield, Halana triggers
6. Holding priority, activate Ashnod's Altar by sacrificing the Dinosaur, adding
7. Resolve the Halana trigger, causing you to pay to deal 1 damage to Raptor Hatchling
8. Repeat from step 4

Results

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