Fathom Mage, Horizon Chimera, and Light of Promise

Prerequisites

• Fathom Mage on the battlefield
• Horizon Chimera on the battlefield
• Light of Promise on the battlefield

Steps

1. Gain life
2. Fathom Mage triggers, putting a +1/+1 counter on itself
3. Fathom Mage triggers, causing you to draw a card
4. Horizon Chimera triggers, causing you to gain 1 life
5. Repeat from step 2

Results

• Infinite card draw
• Near-infinite lifegain
• Near-infinite lifegain triggers
• Infinite draw triggers
• Near-infinite +1/+1 counters on a creature