Urborg, Tomb of Yawgmoth [Time Spiral Remastered] 78 it enters with an additional

it enters with an additional loyalty counter on it if it's a planeswalker

Whenever Aven Courier attacks

Set: Dungeons & Dragons: Adventures in the Forgotten Realms Promos Type: Legendary Artifact Rarity: Mythic Cost: {5} {2}

She whispered ancient rites over the fallen

or the creature's toughness

Urborg, Tomb of Yawgmoth [Time Spiral Remastered] 78 it enters with an additionalSet: Time Spiral Remastered Type: Legendary Land Rarity: Rare Each land is a Swamp in addition to its other land types. "Yawgmoth's corpse is a wound in the universe. His foul blood seeps out, infecting the land with his final curse." Lord Windgrace