Marath, Will of the Wild, Ashnod's Altar, and Conclave Mentor

Prerequisites

• Marath, Will of the Wild on the battlefield
• Ashnod's Altar on the battlefield
• Conclave Mentor 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, putting two +1/+1 counters on Marath
2. Activate Marath by paying and removing a +1/+1 counter from it, creating a 1/1 Elemental creature token
3. Activate Ashnod's Altar by sacrificing the Elemental, adding
4. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers