Intruder Alarm + Royal Assassin + Urabrask the Hidden

UBR identity

Commander legal

The 3 combo pieces

• Intruder Alarm
• Royal Assassin
• Urabrask the Hidden

How to execute it

1. Whenever a creature enters the battlefield under an opponent's control, it enters tapped due to Urabrask and triggers Intruder Alarm.
2. Holding priority, activate Royal Assassin by tapping it, destroying the creature.
3. Resolve the Intruder Alarm trigger, untapping all creatures.
4. Repeat.

What the combo produces

• Destroy each creature that enters the battlefield under an opponent's control
• Lock