This book includes an exclusive One Piece card
She doesnt need to attack to get her main bonus: you can drop her in the first main phase and then send your modified creatures into the Red Zone right away for benefit, and while discarding a card to her ward is doable, most players will probably avoid 2-for-1ing themselves unless Arna becomes an emergency
This deck can rely on Darkrai EX (EX) for free retreat, rather than using Fairy Garden
For a Base Set card, Gyarados is pretty powerful with 100 HP, Dragon Rage (which does 50 points of damage) and Bubble Beam, which inflicts 40 points of damage and has the chance of Paralyzing the opponents Pokemon too
This commander, along with Korvold, Fae-Cursed King, can easily induce salt due to their ability to do everything, often leading to long, drawn-out turns without a guaranteed win
Perhaps, since shes the Hand of Erebos, we could do a whole body parts matter theme