Itera, Scion of the Oasis

How about a humanoid Ascended healing support from Shurima who is tasked with guarding the Oasis of the Dawn at all costs? (I am really bad at lore-- especially stepping away from the Summoners canon-- so this is kinda a bare bones description of who she is)

Itera for a name because it came from "iterw" which is Egyptian for River and because it sounds like "terra" when most of her abilities revolve around terraforming rivers from the Oasis

I'd say for her playstyle to be as a tanky backline healer whose main objective is that of a defensive support: keeping carries alive with heals and peel.

Passive: Guide of the Waters Itera leaves behind a trail that speeds up allies (scaling with level, to a maximum of her movement speed) and heals them a bit (with scaling on her current hp), the effectiveness of both also scaling inversely with their distance from her. The duration of the trail increases and she gains the effects of the trail while in the river.

Q: Basin Formation Tap: Itera slams the earth around her to make a river basin, dealing minor damage and stunning enemies in the area for a brief time (scaling with rank), as well as making the area slow enemies (also scaling with rank) and causing it to go on a shorter cooldown. Hold: Itera readies a larger amount of force to create a long river basin in a direction, standing still during the windup. It reaches further and deals more damage based on her windup, applies a longer stun than if it was tapped (also scaling with rank), remains longer, but applying the same slow as if it was tapped.

W: River's Swiftness Itera gains a burst of speed that lasts longer and scales with rank. As well, the effects of her passive are increased during this time.

E: Mirage Itera becomes a copy of target ally and both apply her passive for a duration scaling with rank. It ends if either begin a channel.

Ultimate: Oasis's Serendipity Itera sacrifices 50% of her current health to revive a recently deceased ally close to her and both gain a large burst of speed (scaling with rank) and a duration of cc immunity (also scaling with rank). The ally's health is equal to either her sacrificed health (capped by their max health, duh)

Imma add onto this later but I'm tired