Caelum, the Chisel

Caelum cannot be equipped to a creature as long as it is tapped.
Equipped creature gets +2/+1.
Sentience (As long as Caelum is not equipped to a creature, it becomes a colorless 0/2 construct artifact creature with "{3}{t}: Caelum deals 2 damage to any number of target creatures or planeswalkers")
Equip {2}