Robotics Facility

Cannot attack or block, Shield 2, Costs {4} less if
you control a building named Cybernetics Core.
{t} : Add {2} to your mana pool. Spend to cast
Observer, Warp-Prism, Immortal, Colossus,
or Disruptor creature spells. Those spells have
flash.
{t}, Exert : Return an Observer, Warp-Prism,
Immortal, Colossus, or Disruptor creature spell
from your graveyard to your hand.