How does RDM actually work (what's white vs. black)? (Potential spoilers)

[Unaki]

One of the misconceptions is that White Magic is the art of succor when it isn't quite the case. Conjury is only a classification of the beneficial nature of healing spells and isn't quite a part of White Magic as Red Mages use. The Red Mage uses the White Magic created by Amdapor during the fifth astral era as a means to fight back against Mhach's destructive black magic. Black Magic doesn't quite need an explanation but the most simple explanation of both schools is that they both draw immense amounts of aether to enhance the spells. Modern White Magic (As the player learns it) only exists because of the Padjal's efforts to revive it after the elementals lifted the ban on magic thanks to White Magic's destructive force in the War of the Magi. (White Mages literally caused a great flood on nearly biblical levels which is what destroyed the cities of Mhach and Amdapor.)

Red Mages learned how to take both schools of magic, which are complete opposites of one another, and balance them to create a powerful blend of black and white, which is the whole point of their balance gauge mechanic. The Red Mages are descendants of both the Mhachi and Amdapori mages that came together to fight back against the forces in their homes.

I'm just going to take a guess here and assume that what the red mage does is draw aether into his crystal which allows him to channel that energy into his blade for devastating augmented physical attacks which fits with what it has done in past games with stuff like Enfire, Enthunder, etc. Unfortunately we need to wait until something comes along in the game or through a new lore entry that explains Red Magic more in depth to really get a clear picture because all we know about right now is X'rhun Tia's story from the job quests.