Sporeweb Weaver, and Pandemonium

Prerequisites

• Sporeweb Weaver on the battlefield
• Pandemonium on the battlefield
• You have a way to give Sporeweb Weaver indestructible
• You have a way to cause a creature to enter the battlefield under your control

Steps

1. Give Sporeweb Weaver indestructible, if needed, then cause a creature to enter the battlefield under your control
2. Pandemonium triggers, dealing damage equal to the creature's power to Sporeweb Weaver
3. Sporeweb Weaver triggers, causing you to gain 1 life and creating a 1/1 Saproling creature token
4. When the Saproling enters the battlefield, Pandemonium triggers, dealing damage equal to the Saproling's power to Sporeweb Weaver
5. Repeat from step 3

Results

• Infinite creature tokens
• Infinite ETB
• Infinite lifegain
• Infinite lifegain triggers