Levitating Citadel

Levitating Citadel comes into to play tapped
with three levitation counters.
If there are no levitation counters on Levitating
Citadel, bury it.
{t}, add {1} to your mana pool.
Remove a levitation counter and place a 1/1
thopter artifact creature token onto the
battlefield with flying.
Sacrifice a thopter: add one levitation counter to
Levitating Citadel or add {u}{u} to your mana pool.