Aetherius, the Eternal Voyager

Flying
-Whenever Aetherius, the Eternal Voyager enters the
battlefield or attacks, you may search your library for a
land card, put it onto the battlefield tapped, then shuffle your library.
-Whenever you play a land, you may draw a card.
-Whenever an opponent plays a spell, you
may pay 2U. If you do, counter that spell
unless its controller pays X, where X is t
he number of lands you control.