3 Barrage O'Clock Exeggutor (Surging Sparks 3/191) As one of the cards in the very recently released Surging Sparks set, Exeggutor has a move with a very amusing name that is also immensely powerful
Having to find enough Lightning, Grass, and Metal Energies can be hard, and keeping them out of the Discard Pile can be even harder
It's very easy for your opponents to knock each other out in quick succession if their boards are full, and depending on the turn order, Taunt from the Rampart could very easily narrow down the game before you get back to your next turn
Stay with Me / Rhystic Study (FCA) $100 WotC's bent on weaving these two Final Fantasy characters into as many I'm not crying, you're crying! moments as they can
Theres a fun mix between creatures and other spells to give you a different strategy each game, especially if you switch commanders