Halo Fountain, Aphetto Alchemist, and Transdimensional Bovine

Prerequisites

• Halo Fountain on the battlefield
• Aphetto Alchemist on the battlefield
• Transdimensional Bovine on the battlefield

Steps

1. Activate Transdimensional Bovine by tapping it, adding Activate Aphetto Alchemist by tapping it, targeting Halo Fountain
2. Holding priority, activate Halo Fountain by paying , tapping it, and untapping Aphetto Alchemist and Transdimensional Bovine, causing you to draw a card
3. Resolve the Aphetto Alchemist ability, untapping Halo Fountain
4. Repeat

Results

• Infinite card draw
• Infinite draw triggers