Crackdown Construct + Cryptolith Rite + Horseshoe Crab

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}.
  3. Crackdown Construct triggers, giving itself +1/+1 until end of turn.
  4. Resolve the Horseshoe Crab ability, untapping it.
  5. Repeat.

What the combo produces