Ghired, Mirror of the Wilds, and Sky Hussar

Prerequisites

• Ghired, Mirror of the Wilds on the battlefield
• Sky Hussar on the battlefield

Steps

1. Create a token copy of Sky Hussar
2. Activate Ghired by tapping it, creating a token copy of the Sky Hussar copy
3. When the Sky Hussar token enters the battlefield, it triggers, untapping all creatures you control
4. Repeat from step 2

Results

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