Yahar'gul, Unseen Village

Unseen 3 ( Unseen X: If another land that does not contain "Yahar'gul" in its name enters the battlefield under your control, sacrifice Yahar'gul, Unseen Village, unless there a X counters or more
on this card. Whenever a card with "Yahar'gul" in its name enters the battlefield under your control, apply 1 counter.)

{t}: Add {b}{b}.