Sporeweb Weaver + Terror of the Peaks

Prerequisites

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. Terror of the Peaks 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, Terror of the Peaks triggers, dealing damage equal to the Saproling's power to Sporeweb Weaver.
5. Repeat from step 3.