Some of the spells destroy creatures, others exile them, and recently, blue has gained the ability to remove artifacts (see Ravenform)
SEE THEIR ONLINE HELP SECTION FOR EXPORTING FOR PROFESSIONAL PRINTING Once you have all your files exported (preferably as individual designs)
Endurance, as part of the pitch cards and evoke cycle of Modern Horizons 2, has multiple reasons whats making it extremely good
Plus, you can open all sorts of cards with Booster Fun treatments, such as cards with the showcase magnified treatment, each depicting a story spotlight moment from working on the case
For creatures, I went with cards that had some way to mess with the blue player at the table
Expansion cards are identified by the turtle shell set stamp