Scion of the Ur-Dragon

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 your library.
Card Type Breakdown
Land
37 cards
Creature
25 cards
Enchantment
8 cards
Sorcery
12 cards
Artifact
9 cards
Instant
8 cards
Planeswalker
1 cards
Frequent Cards
Land
Command Tower 82%
Haven of the Spirit Dragon 70%
Temple Garden 58%
Watery Grave 55%
Breeding Pool 52%
Exotic Orchard 52%
Stomping Ground 52%
Blood Crypt 52%
Steam Vents 52%
Savage Lands 48%
Creature
Atarka, World Render 82%
Silumgar, the Drifting Death 76%
Bladewing the Risen 76%
Teneb, the Harvester 64%
Utvara Hellkite 61%
Savage Ventmaw 58%
Steel Hellkite 58%
The Ur-Dragon 58%
Nicol Bolas 55%
Scourge of Valkas 52%
Enchantment
Dragon Tempest 82%
Temur Ascendancy 52%
Animate Dead 45%
Crucible of Fire 39%
Rhythm of the Wild 33%
Bower Passage 30%
Elemental Bond 30%
Monastery Siege 30%
Kindred Discovery 24%
Frontier Siege 24%
Sorcery
Crux of Fate 82%
Farseek 70%
Cultivate 55%
Kodama's Reach 55%
Rampant Growth 52%
Demonic Tutor 39%
Reanimate 33%
Primevals' Glorious Rebirth 33%
Living Death 30%
Skyshroud Claim 30%
Artifact
Chromatic Lantern 76%
Sol Ring 67%
Lightning Greaves 58%
Swiftfoot Boots 45%
Dragon's Hoard 39%
Darksteel Ingot 33%
Commander's Sphere 30%
Fellwar Stone 30%
Herald's Horn 24%
Quicksilver Amulet 21%
Instant
Brainstorm 36%
Counterspell 33%
Swords to Plowshares 33%
Cyclonic Rift 33%
Path to Exile 30%
Sarkhan's Triumph 27%
Anguished Unmaking 24%
Mystical Tutor 21%
Enlightened Tutor 18%
Vampiric Tutor 18%
Planeswalker
Sarkhan Unbroken 33%
Sarkhan, Fireblood 21%
Sarkhan the Mad 12%
Sarkhan, Dragonsoul 12%
Ugin, the Spirit Dragon 12%
Nicol Bolas, Planeswalker 9%
Sarkhan the Masterless 9%
Nicol Bolas, the Ravager // Nicol Bolas, the Arisen 9%
Kasmina, Enigmatic Mentor 3%
Kiora, Behemoth Beckoner 3%