Marath, Will of the Wild, Ivy Lane Denizen, and Ashnod's Altar

Prerequisites

• Marath, Will of the Wild on the battlefield
• Ivy Lane Denizen on the battlefield
• Ashnod's Altar on the battlefield
• At least two +1/+1 counters on Marath, Will of the Wild

Steps

1. Activate Marath, Will of the Wild's ability by paying and removing one +1/+1 counter from it, creating a 1/1 Elemental creature token
2. Ivy Lane Denizen triggers, causing you to put a +1/+1 counter on Marath
3. Activate Ashnod's Altar by sacrificing an Elemental token, adding
4. Repeat

Results

• Infinite colorless mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers