Omnath, Locus of the Desert

Eminence — Lands that have "{t}:Add {c}" you control are basics in addition to their other types.
The same is true for lands you own that aren't on
the battlefield.
When you cast Omnath, Locus of the Desert you
may search your library for an artifact creature
card with converted mana cost equal to the
amount of {c} mana used to cast this spell, reveal
it, and put it into your hand. If you do, shuffle
your library.