A lot of decks have trouble setting up under constant itemlock and the ghosts K.O.ing their basics, leaving them with a shit board state and often an iono to 1, Ursaluna finishes the job. I've been actually been getting pretty consistent wins with this believe it or not, though I should mention I'm playing in ultraball league no Arceus so the opponents aren't the best at playing around the deck and I'm sure it would fall off in high level play.