Groxx, Trash Tinkerer

Eminence- Whenever you cast an artifact spell, if Groxx is in the command zone or on the battlefield, create a colorless Junk artifact token.
{w}{u}{b}{r}{g}, {t}, Sacrifice three Junk tokens: Search your library for an artifact card and put it onto the battlefield, then shuffle your library.
"There's no such thing as useless trash! I just simply haven't found a use for it yet."