1/2 goblin artificer
When this etb, search your library for an artifact and put it in your grave.
R, tap, sac an artifact: Return an Artifact with CMC 3 or less from grave to play.
I'm thinking this has implications for Vintage. Can technically find both peices to Vault/Key and put them into play. Makes psuedo Welder 4-8, makes trash for treasure a tinker???? What do others think?