This card shuts down the ability to Fusion summon completely and remains active as a continuous trap card until your opponent can remove it from the field - something easier said than done for many modern decks
Heck, you even have Cavern of Souls in this set, which we'll be talking about next
Its Number C form, Dark Storm, can do the same if Dark Mist is attached to it as an Xyz Material, except its effect reduces the opposing battling monster's ATK to 0, whilst increasing Dark Storm's ATK by the original ATK of the opponent's monster
we were introduced to some new Amonkhet gods with Sab-Sunen, Luxa Embodied and Ketramose, the New Dawn, we picked up a new cycle of 2-color Gearhulks and a batch of underwhelming-but-funny vanilla legendaries, and I'd say the experimentation with The Aetherspark went over well enough, as one of the most unique card designs this year
Crow, Bystials, Dropplet, any TTT could be here, but I do not need to explain why