Vrondiss, Rage of Ancients, Halana, Kessig Ranger, and Ashnod's Altar

Prerequisites

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

Steps

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

Results

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