Trelasarra, Moon Dancer, Agatha's Soul Cauldron, and Spike Feeder

Prerequisites

• Trelasarra, Moon Dancer on the battlefield
• Agatha's Soul Cauldron on the battlefield
• Spike Feeder in exile
• Trelasarra has at least one +1/+1 counter on it

Steps

1. Activate Trelasarra using Spike Feeder's second ability by removing a +1/+1 counter from it, causing you to gain 2 life
2. Trelasarra triggers, putting a +1/+1 counter on itself and causing you to scry 1
3. Repeat

Results

• Infinite lifegain
• Infinite lifegain triggers
• Infinite scry 1