Prototype Portal, Intruder Alarm, and March of the Machines

Prerequisites

• Prototype Portal on the battlefield
• Intruder Alarm on the battlefield
• March of the Machines on the battlefield
• Prototype Portal does not have summoning sickness

Steps

1. Activate Prototype Portal by tapping it and paying , creating a token copy of the imprinted artifact
2. When the artifact enters the battlefield, if it is a 0/0 creature, it dies as a state-based action
3. Intruder Alarm triggers, untapping all creatures, including Prototype Portal
4. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite death triggers
• Infinite untap of all creatures
• Infinite mana creatures you control can produce
• Infinite mana artifacts you control can produce
• Infinite untap of all artifacts