Halo Fountain, Aphetto Alchemist, and Arbor Adherent

Prerequisites

• Halo Fountain on the battlefield
• Aphetto Alchemist on the battlefield
• Arbor Adherent on the battlefield

Steps

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

Results

• Infinite card draw
• Infinite draw triggers
• Near-infinite creature ETB
• Near-infinite creature tokens