Academy Manufactor, Carrion Feeder, Cauldron Familiar, and Ulvenwald Mysteries

Prerequisites

• Academy Manufactor on the battlefield
• Carrion Feeder on the battlefield
• Cauldron Familiar on the battlefield
• Ulvenwald Mysteries on the battlefield

Steps

1. Activate Carrion Feeder by sacrificing Cauldron Familiar
2. Ulvenwald Mysteries' first ability triggers, creating a Clue, a Food, and a Treasure token
3. Resolve the Carrion Feeder ability, putting a +1/+1 counter on it
4. Activate Cauldron Familiar by sacrificing a Food token, returning Cauldron Familiar from your graveyard to the battlefield
5. Cauldron Familiar enters the battlefield, causing each opponent to lose 1 life and you to gain 1 life
6. Repeat

Results

• Infinite +1/+1 counters on Carrion Feeder
• Infinite card draw
• Infinite Clue tokens
• Infinite colored mana
• Infinite death triggers
• Infinite draw triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite Treasure tokens
• Near-infinite creature tokens