Gruaga, Master of the Pit

Vehicles you control get +1/+0 for each token creature you control.
Whenever an artifact enters a graveyard from anywhere, create a 0/1 Grease Monkey artifact
creature with "Sacrifice this creature: return
target artifact to the battlefield, or add +1/+0 to
target artifact creature or vehicle"
—
"I want this back on the road in twenty minutes. It
won't last forever, but by the gods it'll be fast."