If you control an Xyz Monster with a DARK Xyz Monster as material: You can target 1 Level 4 or lower "Raidraptor" monster in your GY
My previous one was Draining Whelk which could win the game with the big casting costs in the format, but this is better since it cannot just be answered by a single 1:1 removal spell like Utter End
After two elimination rounds just 16 players remained, sporting a variety of deck archetypes, including Skill Drain HERO , Piper Chaos , Dino Rabbit , Dark World , Wind-Up , Inzektor , and Chain Burn
HONORABLE MENTION: IONA, SHIELD OF EMERIA ( ZENDIKAR ) Iona, Shield of Emeria shares the title of Most Expensive Mana Value Angel in Magic with Reya Dawnbringer, and its easy to see why
The hope is that eventually it will pan-out into a plan for improving Pokemon Trading Card stock for fans, though time will tell if Pokemon TCG expansions will actually become easier to get hold of