Halana, Kessig Ranger, Sporeweb Weaver, and Ashnod's Altar

Prerequisites

• Halana, Kessig Ranger on the battlefield
• Sporeweb Weaver 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 Sporeweb Weaver indestructible
• available

Steps

1. Give Sporeweb Weaver indestructible by any method
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 Sporeweb Weaver
4. Sporeweb Weaver triggers, causing you to gain 1 life and create a 1/1 Saproling creature token
5. When the Saproling enters the battlefield, Halana triggers
6. Holding priority, activate Ashnod's Altar by sacrificing the Saproling, adding
7. Resolve the Halana trigger, causing you to pay to deal 1 damage to Sporeweb Weaver
8. Repeat from step 4

Results

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