Scion of the Ur-Dragon [Commander 2017] Adventure then sacrifices all creatures they

then sacrifices all creatures they control

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

Set: Sun & Moon: Team Up Type: Dragon Rarity: Holo Rare Retreat cost: Colorless

When you've got nothing

Decrease the ATK of this card by 400 points

Scion of the Ur-Dragon [Commander 2017] Adventure then sacrifices all creatures theySet: 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."