MAGIC: THE GATHERING
As an additional cost to cast Tinker, sacrifice an artifact.
Search your library for an artifact card and put that card onto the battlefield. Then shuffle your library.
Tinker is an incredibly powerful combo enabler in Vintage, where it is very possible to throw down a few Moxen, sacrifice one of them, and show a Blightsteel Colossus to your opponent. Having an 11/11 Trample Infect Indestructible Golem on turn one is fair, right?