Cathylar, shifting mass

Reach, indestructible
Eminence;
Lands and other artifacts you control get "{1}{t} draw a card or search your library for a basic land and put it on the top of your library, then this card becomes a planet in addition to its other subtypes."

At the beginning of your upkeep you may look at the top X cards of your library, then you may put X artifacts or lands you find there onto the battlefield tapped where X is the amount of planets you control, Put the rest at the bottom of your library in a random