Which one do you want to see? This will be a ways down the line, but I have to start planning for it soon.

Option 1: White Chaos Mage

Garnet will gain the ability to give form to her elemental magic, much like Crimson Lotus: Blade of Lightning. It's been kind of useless due to its insanely long prep time. This class will mitigate it and transform most of her existing spells as one off weapons as well. Wind Blade for example, will become an actual sword that can be used for a number of swings before it disappears. Lightning Fire Bolt will become like a gauntlet that you can fire by throwing a punch, but you could also punch someone with it at close range for insane damage with it. The downside to this form is that it has very high mana consumption and it will give Garnet a disadvantage in long drawn out fights though she will dominate in short ones.

Option 2: Black Chaos Mage

Garnet's transformations will increase in power, with some of them losing their restrictions.  For example, the Blood Reaper mode will lose its magic restriction and become useful along with being able to poison people with its magic. Elementalist will merge with the Temptress of the Night form to give birth to one even stronger. The sealed skill Garnet got from the Zmaj will also unlock from this option (Tri-Element Breath) along with a few other breath attacks. Absorbing certain enemies will also grant new transformations. The downside to this form is that maximum mana is decreased while transformed, preventing Garnet from using the top tier spells.

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Option 3: Red Chaos Mage

This one will set Garnet down the path of weapon based combat, using her weapon combined with elemental magic. All of her attacks will be able to have elements. You will see more attacks like the Palm Strike variations and less long ranged magic, which has been the main focus so far. Crescent for example, will be able to release a semicircle burst of any element. Partial Transformation will also have a key role in this, allowing Garnet to have something that is something like dual wielding, but without the disadvantages of it. Mana consumption is much lower in this one form. The downside to this form is that most magic will have reduced areas of effect, making it less efficient in large scale combat.