There are many reasons one might collect cards from the Scarlet & Violet era of the Pokmon TCG, first and foremost is the Terastal phenomenon, and return of 'ex' cards which adds a new, unique strategic consideration to the playing card game
On top of being powerful, Arceus ex also has plenty of different rarities to seek out
R&D reminded them that we had passed the window where we could fit in the allotted time we traditionally had to make a set
Remember that it protects permanents
There's a smattering of cards that specifically interact with otters or make otters, and many of them are nice, efficient cards, even for a spellslinger deck with inexplicably few otters: Lilypad Village Valley Floodcaller Harnesser of Storms Otterball Antics Pearl of Wisdom Rockface Village Splash Portal Stormchaser's Talent Valley Flamecaller All of this adds up to an Izzet Prowess deck that features otters, which is awesome
Hot Soup adds a fourth member to this list