Scion of the Ur-Dragon [Commander 2017] Adventure Add an amount of {B}

Add an amount of {B} equal to the sacrificed creature's mana value

gain control of target creature of an opponent's choice they control

Even the wicked have nightmares

You can only use this effect once per turn during your Main

When you've got nothing

Scion of the Ur-Dragon [Commander 2017] Adventure Add an amount of {B}Set: Commander 2017 Type: Legendary Creature Dragon Avatar Rarity: Rare Cost: {W}{U}{B}{R}{G} Flying {2}: Search your library for a Dragon permanent card and put it into your graveyard. If you do, Scion of the Ur Dragon becomes a copy of that card until end of turn. Then shuffle. "I am the blood of the ur dragon, coursing through all dragonkind."