Fleet Admiral Thopter

Flying
Fleet Admiral Thopter power and toughness
are each equal the number of Thopters you
control.
Colorless Artifacts creatures have Flying and are Thopters in addition to their other types.
{2}, Sacrifice target Colorless Artifact creature
then return target Colorless Artifact creature
from your graveyard to the battlefield that has
a mana value of 1 plus the Sacrificed creature
mana value