Halana, Kessig Ranger, Ashnod's Altar, and Saber Ants

Prerequisites

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

Steps

1. Give Saber Ants 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 Saber Ants
4. Saber Ants triggers, causing you to create a 1/1 Insect creature token
5. When the Insect enters the battlefield, Halana triggers
6. Holding priority, activate Ashnod's Altar by sacrificing the Insect, adding
7. Resolve the Halana trigger, causing you to pay to deal 1 damage to Saber Ants
8. Repeat from step 4

Results

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