Idyllic Cascades

Idyllic Cascades enters the battlefield tapped.
As long as you control 10 or less other lands,
Idyllic Cascades is a land. (It isn't a creature.)
As long as Idyllic Cascades is a creature, creatures
your opponents control with unblockable, flying, shadow, or landwalk of any kind may be blocked
as though they didn't have that ability.
{t}: Add {c}{u}.