Unesh, Criosphinx Sovereign [Hour of Devastation Prerelease Promos] Vampire Warrior "why did Urza build it

"why did Urza build it to be like me

Set: Prophecy Type: Creature — Avatar Rarity: Rare Cost: {6}{B}{B} If there are ten or more creature cards total in all graveyards

sacrifice it unless you pay its echo cost

Black Vise deals X damage to that player

Unesh, Criosphinx Sovereign [Hour of Devastation Prerelease Promos] Vampire Warrior "why did Urza build itSet: Hour of Devastation Prerelease Promos Type: Legendary Creature Sphinx Rarity: Mythic Cost: {4}{U}{U} Flying Sphinx spells you cast cost {2} less to cast. Whenever Unesh, Criosphinx Sovereign or another Sphinx enters the battlefield under your control, reveal the top four cards of your library. An opponent separates those cards into two piles. Put one pile into your hand and the other into your graveyard.