Soul Diviner, Patchwork Crawler, and Barrenton Medic

Prerequisites

• Soul Diviner in exile
• Patchwork Crawler on the battlefield
• Barrenton Medic in exile
• Patchwork Crawler does not have summoning sickness, and does not have a -1/-1 counter on it

Steps

1. Activate Patchwork Crawler using Barrenton Medic's second ability by putting a -1/-1 counter on it, untapping it
2. Activate Patchwork Crawler using Soul Diviner's ability by tapping it and removing a -1/-1 counter from it, causing you to draw a card
3. Repeat

Results

• Infinite card draw
• Infinite draw triggers