Intruder Alarm + Orthion, Hero of Lavabrink

UR identity

Commander legal

The 2 combo pieces

What must be in place

Orthion does not have summoning sickness.
Creatures you control can tap to produce at least {1}{R}.

How to execute it

  1. Activate all mana-producing creatures you control by tapping them, adding at least {1}{R}.
  2. Activate Orthion's first ability by paying {1}{R} and tapping it, creating a token copy of any other creature you control with haste.
  3. When the creature token enters the battlefield, Intruder Alarm triggers, untapping all creatures.
  4. Repeat.
  5. If creatures you control can tap to produce at least {2}{R}, this combo nets infinite mana.

What the combo produces