Wreckage Responder

When Wreckage Responder enters the battlefield, you may Assemble up to two Contraptions with total converted mana cost 2 or less. (Put up to two Contraption card with total converted mana cost 2 or less you own from outside the game onto the battlefield under your control.)
"Not know how to assemble contraptions?!? EVERYONE knows how to assemble contraptions!"