Two copies of Dragon Fire from a dwindling Set 1 are a bonus and Mauis Fish Hook is seeing inclusion in early drafts for Set 4 Ruby/Amethyst decks
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
As mentioned earlier, the other is an action ability
Not to mention that even if said bodyguard is dealt with, Perdita, Devoted Mother will be able to bring them back next turn when she quests
If you did, what did you do with it (after the initial shock, of course!)
Due to this synergy, they were frequently included together in decks like Orzhov Pixie, Rakdos Aggro, Mono-Black Midrange, Golgari Midrange, Jund Midrange, and Jund Sacrifice