March of the Machines, Intruder Alarm, and Undercity Scrounger

Prerequisites

• March of the Machines on the battlefield
• Intruder Alarm on the battlefield
• Undercity Scrounger on the battlefield
• Undercity Scrounger does not have summoning sickness
• A creature has died this turn

Steps

1. Activate Undercity Scrounger by tapping it, creating a Treasure token
2. The Treasure token enters the battlefield as a 0/0 artifact creature, and therefore dies as a state-based action due to having zero toughness
3. Intruder Alarm triggers, untapping all creatures
4. Repeat

Results

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