Tinker

{2}{U} · Sorcery

As an additional cost to cast this spell, sacrifice an artifact. Search your library for an artifact card, put that card onto the battlefield, then shuffle.

Motor: se resuelve a mano

Rulings (1)

Because the "search" requires you to find a card with certain characteristics, you don't have to find the card if you don't want to.
Wizards of the Coast · 2004-10-04