Forge the Realmwardens

Convoke. Buyback - Sacrifice a non-token artifact or land.
Create a copy of target Construct creature.
Until end of turn, Construct creatures you control gain +2/+2, Haste, and your choice of Deathtouch, Lifelink, Vigilance, First Strike or Hexproof.
Through Namor's labor, the Citadel will endure.