Marath, Will of the Wild, Cathars' Crusade, and Ashnod's Altar

Prerequisites

• Marath, Will of the Wild on the battlefield
• Cathars' Crusade on the battlefield
• Ashnod's Altar on the battlefield
• Marath has at least two +1/+1 counters on it
• available

Steps

1. Activate Marath by paying and removing a +1/+1 counter from it, creating a 1/1 Elemental creture token
2. The Elemental enters the battlefield, triggering Cathars' Crusade, putting a +1/+1 counter on each creature you control
3. Activate Ashnod's Altar by sacrificing the Elemental, adding
4. Repeat

Results

• Infinite colorless mana
• Infinite creature tokens
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite +1/+1 counters