Agatha's Soul Cauldron, Spike Feeder, and Gideon's Company

Prerequisites

• Agatha's Soul Cauldron on the battlefield
• Spike Feeder in exile
• Gideon's Company on the battlefield
• Gideon's Company has at least one +1/+1 counter on it

Steps

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

Results

• Infinite +1/+1 counters on Gideon's Company
• Infinite lifegain
• Infinite lifegain triggers