By adding black into the Burn mix, you get access to removal that can also damage creatures not able to be taken care of by traditional burn spells
Transforming Double-Faced Cards: Double-faced cards return, allowing players to cast the front face for its mana cost and transform it to the back face upon meeting specific conditions
Modern Horizons 2 appears to be continuing this trend, and in addition to being one of the most powerful sets of all time, its shaping up to be one of the best, too
Then they gain Lore equal to the Lore icon(s) on the Character card, plus any special abilities it may have
It will simply be easy and consistent lore gain, if you can keep up in cards (gee..there's that A Whole New World again!) Belle will be a much more consistent finisher than she was in the past, and will finally be the staple in any competitive Sapphire list
Legends that are only so on the back end are not included - so Sidequest: Hunt the Mark /// Yiazmat, Ultimate Mark isn't included, nor is the melded form of Ragnarok, Divine Deliverance though it is referenced on its constituent cards