The Tomb of Yawgmoth is the shattered remains of the Rathi Stronghold, where Yawgmoth ultimately fell following the Phyrexian Invasion of Dominaria. From the tomb, the stain on the land spreads outward like tentacles of black mana corrupting the land.

The metal cap of the former mountain stronghold has corroded awa, and no magic emanates from the structure. The site of Yawgmoth's death still poisons the land; it is tainted forever.

Urborg, Tomb of Yawgmoth