Enduring Renewal, Ashnod's Altar, and Intruder Alarm

Prerequisites

• Enduring Renewal on the battlefield
• Ashnod's Altar on the battlefield
• Intruder Alarm on the battlefield
• You control a nontoken creature that can be cast using
• You have at least one creature card in hand
• Creatures you control can tap to produce enough mana to cast the creature card minus
• (at most) available

Steps

1. Activate Ashnod's Altar by sacrificing the creature, adding
2. When the creature dies, Enduring Renewal triggers, returning the creature from your graveyard to your hand
3. Cast the creature by paying its mana cost
4. Repeat
5. If the creature can be cast using or less, this combo nets infinite colorless mana
6. Activate all mana-producing creatures you control by tapping them, adding at least
7. Cast the creature card by paying its mana cost
8. When the creature enters the battlefield, Intruder Alarm triggers, untapping all creatures
9. Activate Ashnod's Altar by sacrificing the creature, adding
10. When the creature dies, Enduring Renewal triggers, returning the creature to your hand from your graveyard
11. Repeat

Results

• Infinite colorless mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite mana creatures you control can produce
• Infinite sacrifice triggers
• Infinite storm count
• Infinite untap of all creatures