Tomb of Zenathos

Tomb of Zenathos enters the battlefield tapped
{t}, pay 1 life: add {1}
{t}, pay 3 life: create a tapped 2/2 black zombie creature token with menace. activate this ability
only if you control six or more Deserts.
{t}, pay 10 life, sacrifice Tomb of Zenathos: create
Zenathos, a 10/10 black zombie legendary
creature token with deathtouch, lifelink, menace
and indestructible. activate this ability only if you control exactly seven Deserts with deferent names