Ashnod's Altar, Denry Klin, Editor in Chief, and Geralf's Mindcrusher

Prerequisites

• Ashnod's Altar on the battlefield
• Denry Klin, Editor in Chief on the battlefield
• Geralf's Mindcrusher on the battlefield
• Denry Klin has at least one +1/+1 counter on it
• Geralf's Mindcrusher does not have a +1/+1 counter on it

Steps

1. Activate Ashnod's Altar by sacrificing Geralf's Mindcrusher, adding
2. Geralf's Mindcrusher dies, triggering its persist ability, returning it from your graveyard to the battlefield with a -1/-1 counter on it
3. Geralf's Mindcrusher enters the battlefield, triggering itself and Denry Klin
4. Resolve the Geralf's Mindcrusher trigger, causing a player to mill five cards
5. Resolve the Denry Klin trigger, putting a +1/+1 counter on Geralf's Mindcrusher
6. Repeat

Results

• Infinite colorless mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite mill
• Infinite sacrifice triggers
• Infinite self-mill