You can effectively fight all of your opponents creatures until your Polukranos dies, then you can bring it back for its Escape cost and then its a 12/12
These are often the most powerful cards out there, and as such require knowledge of how to properly ramp up into these big Monsters without losing too much tempo on the gamestate
The winners of these contests each received a Pokmon Illustrator card
Approach of the Second Sun As Luck Would Have It Azor's Elocutors Barren Glory Battle of Wits Biovisionary Call the Spirit Dragons Central Elevator // Promising Stairs Central Elevator // Promising Stairs Chance Encounter Coalition Victory Darksteel Reactor Doctor Doom, Unrivaled Duelists' Convocation International (playtest) Epic Struggle Felidar Sovereign Form of the Approach of the Second Sun Gallifrey Stands Halo Fountain Happily Ever After Hedron Alignment Helix Pinnacle Hellkite Tyrant Jace, Wielder of Mysteries Laboratory Maniac Laboratory Maniac Liliana's Contract Luck Bobblehead Mayael's Aria Maze's End Mechanized Production Mortal Combat Near-Death Experience Now I Know My ABC's Ramses, Assassin Lord Revel in Riches Shinryu, Transcendent Rival Simic Ascendancy Test of Endurance Thassa's Oracle The Cheese Stands Alone Triskaidekaphile Twenty-Toed Toad Wowzer, the Aspirational (playtest)

20th Anniversary Starter Pack (Generations): Another exception for the XY era is the Japanese Generations set, which was only printed in unlimited edition without 1st edition print run
Enchanting, Isnt It