Preston, the Vanisher, Ashnod's Altar, Chord of Calling, and Faceless Butcher

Prerequisites

• Preston, the Vanisher on the battlefield
• Ashnod's Altar on the battlefield
• Chord of Calling in hand
• Faceless Butcher in the library
• at most available

Steps

1. Cast Chord of Calling by paying at most , searching your library for Faceless Butcher and putting it onto the battlefield
2. When Faceless Butcher enters, it and Preston trigger
3. Resolve the Faceless Butcher trigger, exiling another creature if needed
4. Resolve the Preston trigger, creating a token copy of Faceless Butcher that is a 0/1 Illusion
5. When the Faceless Butcher token enters, it triggers, exiling the nontoken Faceless Butcher
6. Activate Ashnod's Altar by sacrificing the Faceless Butcher token When the Faceless Butcher token dies, it triggers, returning Faceless Butcher from exile to the battlefield
7. Repeat from step 2

Results

• Infinite ETB
• Infinite LTB
• Infinite colorless mana
• Infinite creature tokens
• Infinite death triggers
• Infinite recursion of creature cards in your graveyard
• Infinite sacrifice triggers