Myr Battlesphere, Mimic Vat, Clock of Omens, and Basalt Monolith

Prerequisites

• Myr Battlesphere in exile
• Mimic Vat on the battlefield
• Clock of Omens on the battlefield
• Basalt Monolith on the battlefield

Steps

1. Activate Basalt Monolith's first ability by tapping it, adding
2. Activate Mimic Vat by paying and tapping it, creating a token copy of Myr Battlesphere with haste
3. Myr Battlesphere enters the battlefield, creating four 1/1 Myr creature tokens
4. Activate Clock of Omens by tapping two Myrs, untapping Mimic Vat
5. Activate Clock of Omens by tapping two Myrs, untapping Basalt Monolith
6. Repeat

Results

• Infinite creature tokens with haste
• Infinite ETB
• Infinite LTB
• Infinite mana artifacts you control can produce
• Infinite untap of artifacts you control