Halo Fountain, Ilysian Caryatid, and North Pole Patrol

Prerequisites

• Halo Fountain on the battlefield
• Ilysian Caryatid on the battlefield
• North Pole Patrol on the battlefield

Steps

1. Activate Ilysian Caryatid by tapping it, adding Activate North Pole Patrol by tapping it, targeting Halo Fountain
2. Holding priority, activate Halo Fountain by paying , tapping it, and untapping North Pole Patrol and Ilysian Caryatid, causing you to draw a card
3. Resolve the North Pole Patrol ability, untapping Halo Fountain
4. Repeat

Results

• Infinite card draw
• Infinite draw triggers