Works for me, don't know if I ever said it officially but i will take the special Find steed, Celestial Tiger, as my 'magical item' and work it into my backstory as a gift from Kora.
Actually, to make it magical, I'm going to give you like a once-a-day item that will let you summon the mount without burning the spell slot.
Seeing as its your character concept, I'd be kind of a jerk to make you give up very limited spell slots just to make your character work