Helga, the Ancient Alchemist

Helga is a ranged mage support, who uses decisive mixing of potions to deal damage or apply status effects to allies or enemies. She does not use the tradition "3 standard 1 ult" skill tree. Instead, she uses a "mixing" sort of tree.

Passive: Helga receives 2/3.5/5 mana regen/5 seconds as she casts spells. This effect stacks up to 3 times, and lasts for 5 seconds after she has cast an ability

Q: Upon activation, Helga adds the "Blue Reagent" to her potion

W: Upon activation, Helga adds the "Red Reagent" to her potion

E: Upon activation, Helga adds the "Yellow Reagent" to her potion

R: Upon cast, Helga throws her cask onto the desired area. This ability gains effects based on which Reagents have been added to her potion (Helga may mix two potions at most together). If Helga activates her R again with no Reagents added, she casts the "Omnipotent Mix." This potion has double the standard area of effect of her normal cast, deals x (+x ap ratio) damage, and stuns all enemies hit for "x/x/x" seconds. Leveling up her ultimate also increases certain effects of the Purple, Green, and Orange Reagents

Reagent effects:

Blue: If cast on allies, Blue Reagent will grant "x%/x%/x%/x%/x%" maximum mana to all allies within the area. If cast on enemies, Blue Reagent will increase the cooldowns of all enemies, by 2 seconds, for 2/3/4 seconds

Red: If cast on allies, Red Reagent will grant a buff that adds "x/x/x/x/x" AP + AD to each ally minion/champion. If cast on enemies, it will reduce all damage dealt by enemies by 5/7.5/10% for 3/3.5/4 seconds

Yellow: If cast on allies, Yellow Reagent will grant "x/x/x/x/x" movement speed to all ally champions in the area. If cast on enemies, it will slow all enemies in the area by "x"%

Purple (Red+Blue): Purple Reagent only affects enemies: Once cast, it will nuke enemies for "x/x/x" (+x ap ratio)

Green (Blue+Yellow): Green Reagent only affects allies: Once cast, it will heal ally champions for "x/x/x"% maximum health

Orange (Red+Yellow): Orange Reagent only affects Helga: Once cast, Orange Reagent will remove any status effect that has been applied, including ignite, or zed ultimate. (This ability does not remove hard cc)

IMPORTANT NOTE: Adding (casting) Reagents does not cost mana, but each color has a cooldown. Casting Helga's R (with Reagants added) DOES have a mana cost, but has a relatively low cooldown, as it is the only way she can cast abilities. Although, when it is used as the "Omipotent Mix," it has a larger, more "ultimate" cooldown.

I won't try to come up with a lore. I just had this idea a few days ago and it sounded cool to my friends. Feedback is much appreciated