Biomancer's Familiar + Grim Monolith + The Blackstaff of Waterdeep

Mana needed: {U}

GU identity

Commander legal

The 3 combo pieces

What must be in place

Grim Monolith does not have summoning sickness.

How to execute it

  1. Activate Grim Monolith's first ability by tapping it, adding {C}{C}{C}.
  2. Activate The Blackstaff of Waterdeep by paying {1}{U} and tapping it, causing Grim Monolith to become an artifact creature until end of turn.
  3. Activate Grim Monolith's second ability by paying {2}, untapping it.
  4. Activate Grim Monolith's first ability by tapping it, adding {C}{C}{C}.
  5. Repeat from step 3.

What the combo produces