Jarrett The Panda Machinist

Goofy aah - As long as Jarret The Panda Machinist is on the battlefield, all creatures you control are Clowns in addition to their other types.
{t}{x}{r}, Create X 1/1 Clown Robot Artifact Creature Token(s).
Once per turn, you may tap any number of Artifacts you control, Jarret The Panda Machinist gains +1/+1 until end of turn for each Artifact tapped this way.