Larek, Librarian Obscurist

Cards you own have Morph, their morph
cost is equal to their mana cost minus one.
Whenever you turn a card face up you
may choose a basic land type. Search your
library for a basic land card and put it
onto the battlefield tapped. When you do
Larek gains landwalk of the chosen land
type until this ability is activated again.
This ability activates only once each turn.