>Holding up her free hand,
>Remilia conjured a small ball of fire into her palm,
>rolling it gently with a faint rustling sound.

Now I'm wondering if Meiling could teach her firebending. After all, according to Korra, fire is fire; she taught Anne, and offered to teach the Rune Knights, plus Ozai was also able to use the associated martial art with fire sorcery. Remilia having greater command of her innate magic will likely help her in situations where she can't pull out and fire a spellcard.

Also, it'd certainly be interesting to see Korra wonder where Remilia learned such an ancient firebending style.