The opportunity to play your own one-drop spell and then shut down your opponents with free counterspells is already borderline too-good with more significant drawbacks
Ill put some of the highlights in order, then gold, just for people to know what they can expect out of these: Kenrith, the Returned King Akroma's Will Urza, Lord High Artificer Counterspell Cryptic Command Rhystic Study Yawgmoth, Thran Physician Bolas's Citadel K'rrik, Son of Yawgmoth Ragavan, Nimble Pilferer Ancient Copper Dragon Primeval Titan Atraxa, Grand Unifier Tymna the Weaver Isshin, Two Heavens as One Thrasios, Triton Hero #45
Look for good 1 or 2 MV creatures that enter or die and do something useful, like Elvish Visionary or Sakura-Tribe Elder, so you can chain these together
Put ramp spells and big creatures in your deck
When Pokemon V has been Knocked Out, your opponent takes 2 Prize cards
Naganadel & Guzzlord GX Full Art & Alternate Art: Both versions of the card pictured here are a bit underwhelming in the midst of such an incredible set