Engineer

Haste, Level Up {3}
{t}: Search your library and graveyard for an
artifact named "Sentry Gun", "Dispenser" or "Teleporter" and put it into your hand.
Shuffle your library.
{1},{t}: Move a lvl counter from Engineer to target artifact.
{2},{t}: Untap target artifact, regenerate it.
"Heavy load comin through!"
by PBRunny