Scrapyard Recombiner 3
Artifact Creature - Construct
T, Sacrifice and artifact: Search your library for a Construct card, reveal it, put it into your hand, then shuffle your library.
Oh wait. So now we get a tutor for
Ravager/Ballista? This is insane.
EDIT: OOps Ravager is a Beast! Hhahaha. Hangarback, Overseer, Ballista, Chief of the Foundry, Inspector are all constructs.