Cayth, Famed Mechanist, and Intruder Alarm

Prerequisites

• Cayth, Famed Mechanist on the battlefield
• Intruder Alarm on the battlefield
• You control at least one creature token
• Creatures you control can tap to produce at least
• Cayth does not have summoning sickness

Steps

1. Activate any number of creatures you control by tapping them, adding at least
2. Activate Cayth by paying and tapping it, creating a copy of any creature token you control
3. When the creature token enters the battlefield, Intruder Alarm triggers, untapping all creatures
4. Repeat
5. If creatures you control can tap to produce at least , this combo nets infinite mana

Results

• Infinite copies of creature tokens you control
• Infinite creature tokens
• Infinite ETB
• Infinite mana creatures you control can produce
• Infinite untap of all creatures