Mechtitan Core, Prototype Portal, Myr Battlesphere, Clock of Omens, and Krark-Clan Ironworks

Prerequisites

• Mechtitan Core in exile
• Prototype Portal on the battlefield
• Myr Battlesphere on the battlefield
• Clock of Omens on the battlefield
• Krark-Clan Ironworks on the battlefield
• You control at least three other nontoken artifact creatures and/or nontoken Vehicles
• available

Steps

1. Activate Prototype Portal by paying and tapping it, creating a token copy of Mechtitan Core
2. Activate the Mechtitan Core token by paying and exiling it, Myr Battlesphere, and any three other nontoken artifact creatures and/or nontoken Vehicles, creating a 10/10 Mechtitan creature token
3. Activate Krark-Clan Ironworks by sacrificing the Mechtitan token, adding
4. The Mechtitan core token triggers, returning all other cards exiled by it to the battlefield tapped
5. Myr Battlesphere enters the battlefield, creating four 1/1 Myr artifact creature tokens
6. Activate Clock of Omens by tapping two Myr tokens, untapping Prototype Portal
7. Activate Krark-Clan Ironworks three times by sacrificing three Myr tokens, adding
8. Repeat

Results

• Infinite blinking of nontoken artifact creatures you control
• Infinite blinking of nontoken Vehicles you control
• Infinite colorless mana
• Infinite creature tokens
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite mana artifacts you control can produce
• Infinite sacrifice triggers
• Infinite untap of artifacts you control