Horn of Gondor, Clock of Omens, Encroaching Mycosynth, and Ashnod's Altar

Prerequisites

• Horn of Gondor on the battlefield
• Clock of Omens on the battlefield
• Encroaching Mycosynth on the battlefield
• Ashnod's Altar on the battlefield
• You control at least three Humans
• available

Steps

1. Activate Horn of Gondor by paying and tapping it, creating at least three 1/1 Human Soldier creature tokens
2. Activate Clock of Omens by tapping two Human Soldiers, untapping Horn of Gondor
3. Activate Ashnod's Altar twice by sacrificing two Human Soldiers, adding
4. Repeat

Results

• Infinite colorless mana
• Infinite creature tokens
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite mana nonland permanents you control can produce
• Infinite untap of nonland permanents you control