It's a deck from the Masters Division, and I think it specializes more in dealing with low-HP targets and Evolutions. 110 + 50 on 1 Bench Pokemon provides very clean numbers when facing Trevenant and NM decks (if it Lysandre's Shaymin, it can strike it and a Night Marcher to take 3 prizes). Magearna-EX was also included as a 1-of tech for protection against moves such as Silent Fear and Bubble, though whether or not it was a game-changer is up for debate. It also ran 1-of techs of Absol and STS Cobalion for transferring damage counters, early protection, and for the sake of having a secondary attacker.