The Ur-Dragon [Commander 2017] Aether Revolt Prerelease Promos Set: HeartGold & SoulSilver: Black

Set: HeartGold & SoulSilver: Black Star Promos Type: Item Rarity: Black Star Promo

it has hexproof

This card Normal Summon cannot be negated

if Clockwork Avian attacked or blocked this combat

Set: Portal Three Kingdoms Type: Sorcery Rarity: Uncommon Cost: {2}{R} Target opponent chooses a creature they control

The Ur-Dragon [Commander 2017] Aether Revolt Prerelease Promos Set: HeartGold & SoulSilver: BlackSet: Commander 2017 Type: Legendary Creature Dragon Avatar Rarity: Mythic Cost: {4}{W}{U}{B}{R}{G} Eminence As long as The Ur Dragon is in the command zone or on the battlefield, other Dragon spells you cast cost {1} less to cast. Flying Whenever one or more Dragons you control attack, draw that many cards, then you may put a permanent card from your hand onto the battlefield.