Cryptolith Rite + Horseshoe Crab + Mesmeric Orb

GU identity

Commander legal

The 3 combo pieces

What must be in place

Horseshoe Crab does not have summoning sickness.

How to execute it

  1. Activate Horseshoe Crab by tapping it, adding {U}.
  2. Activate Horseshoe Crab by paying {U}, untapping Horseshoe Crab.
  3. Mesmeric Orb triggers, causing you to mill a card.
  4. Repeat.

What the combo produces