The aim of Scions and Spellcraft is to gain advantage through the casting of non-creature spells with Yshtolas sorcerous proclivities making her the perfect face for the deck
While it reads like a card for tribal decks, and you can play it in tribal decks, I think it will actually be at its best in token strategies, which tend to almost accidentally have a lot of creatures of the same type
Lastly, its worth noting that Pokmon has released many special, extra-rare, and promotional cards over the years
Rental decks are available in Pokemon TCG Pocket for players who are first starting to help them gain a handle on building decks
This works without even having an Aetherhub user
The Korean The Masked Royal SR only has 30 copies, and Mewtwo GX HR only 17 copies, and the Mewtwo GX SR version only 36