Intruder Alarm + Rukarumel, Biologist

WUBRG identity

Commander legal

The 2 combo pieces

What must be in place

Rukarumel does not have summoning sickness.
Creatures you control can tap to produce at least {3}.

How to execute it

  1. Activate all mana-producing creatures by tapping them, adding at least {3}.
  2. Activate Rukarumel by paying {3} and tapping it, creating a 1/1 Sliver creature token.
  3. When the Sliver enters the battlefield, Intruder Alarm triggers, untapping all creatures.
  4. Repeat.
  5. If creatures you control can tap to produce at least {4}, this combo nets infinite mana.

What the combo produces