Scion of the Ur-Dragon [Time Spiral] Monk you can't be attacked except

you can't be attacked except by creatures with flying and/or islandwalk

Set: Signature Spellbook: Jace Type: Instant Rarity: Rare Cost: {U} Search your library for an instant or sorcery card

the Mocking Sage can't be blocked by creatures with horsemanship

Everybody knows that to ward off trouble

sacrifice the other

Scion of the Ur-Dragon [Time Spiral] Monk you can't be attacked exceptSet: Time Spiral 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."