Intruder Alarm + Soul Collector + Viridian Longbow

UB identity

Commander legal

The 3 combo pieces

• Intruder Alarm
• Soul Collector
• Viridian Longbow

What must be in place

Viridian Longbow attached to Soul Collector.
Soul Collector does not have summoning sickness.
A player controls a nontoken creature with toughness equal to one.

How to execute it

1. Activate Soul Collector by tapping it, dealing 1 damage to any nontoken creature with toughness equal to one.
2. The creature dies as a state-based action due to having zero toughness, triggering Soul Collector, returning the creature from a graveyard onto the battlefield under your control.
3. The creature enters the battlefield, triggering Intruder Alarm, untapping all creatures.
4. Repeat.

What the combo produces

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