This Standard deck thrives on the synergy of the Fusion Strike mechanic, which is why most of the cards are from the Fusion Strike set
Its also useful to be able to activate ascend as and when you want, and thats where cards like Secure the Wastes come in
If you don't, destroy Imprison
You can also copy Rubina with cards like Spark Double, Double Major, and Irenicus's Vile Duplication to steal multiple creatures and make your opponents have as many answers
Monster Hunter Stories is where it's at if you ask me, but heavy hitters like Shin Megami Tensei and Digimon Story are constantly furnishing creature collector fans with new bangers
Manifest dread, that's a new mechanic in Duskmourn, but it's basically just Manifest only you get a bit more choice about what card you get to play face down