Cayth, Famed Mechanist, and Sky Hussar

Prerequisites

• Cayth, Famed Mechanist on the battlefield
• Sky Hussar on the battlefield

Steps

1. Activate any number of creatures by tapping them, adding at least
2. Activate Cayth by paying and tapping it, creating a copy of the Sky Hussar token
3. When the Sky Hussar token enters the battlefield, it triggers, untapping all creatures you control
4. Repeat

Results

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