Ugin IS a Dragon, right
For example, if you somehow used Souls of the Lost to craft Mastercraft Raptor (perhaps because it became a copy of a Dinosaur), its power while in exile is equal to the number of permanent cards in your graveyard, and Mastercraft Raptor's power will change as the number of permanent cards in your graveyard changes
Advanced Search Sets Random Syntax Adaptive Sporesinger Aerial Formation Aetheric Amplifier Agadeem's Awakening Agility Bobblehead Ajani's Presence Ajani, Nacatl Avenger Ajani, Outland Chaperone Alibou, Ancient Witness Alibou, Ancient Witness Ancient Brass Dragon Angel of Salvation Apocalypse Runner Appa, Steadfast Guardian Arc Lightning Arc Mage Ardenn, Intrepid Archaeologist Armory Automaton Arrow Volley Trap Artisan's Sorrow Atlantis Attacks Atomize Aurelia's Fury Avacyn's Judgment Ballista Charger Barrel Down Sokenzan Basalt Ravager Battlefield Improvisation Be'lakor, the Dark Master Beast Mode Beatrix, Loyal General Bespoke Battlewagon Bessie, the Doctor's Roadster Bioshift Blaze of Glory Blessings of Nature Blinding Flare Bloodhusk Ritualist Bloodthirsty Adversary Bogardan Hellkite Bone Harvest Borborygmos and Fblthp Boulderfall Bounty of the Hunt Brago, King Eternal Brine Seer Brokers Confluence Broodlord Bulwark Ox Burn at the Stake Burner Rocket Cabal Conditioning Cacophony Scamp Calculated Dismissal Call the Coppercoats Cankerbloom Captain America's Motorcycle Carnivorous Canopy Carpet of Flowers Carpet of Flowers Carriage of Dreams Cass, Hand of Vengeance Cat-Gator Cauldron Haze Cauldron of Souls Chandra Ablaze Chandra, Flameshaper Chandra, Heart of Fire Change of Plans Chaos Mutation Chong and Lily, Nomads Chromatic Armor
Not so good in a deck where you plan to hard-cast it once, and only once
