Aegir, The Sea New Champion conecept

I had a whacky idea for a new champion, and yes i believe it probably has many flaws for ive never designed a champion ( and probably many spelling errors as well), but what champ doesn't have flaws. But i think i have the ability to potentially make something i find awesome as well as expand the league of legends universe.

LORE First: Aegir if from a planet consisting of entirely magical water and water beings where Aegir is the most powerful and Ruler of all. Very bored with his rule over his planet he set out to explore other worlds having been aware of the void in the very depths of his planet, he decided to venture there first, however due to the fact that his is made entirely of water he found no real challenge or interest within. Next setting their sights set on space where they encountered a very powerful being manipulating the very universe itself (stars planets etc.) they were astounded that such power could exist and strived to either conquer this power or destroy it, shortly after learning of the League of legends in which many different powers and champions from across the universe they decided to join it leaving there planet behind to discover what resides Beyond the only world known to them. Aegir, the Sea Base Health 650 Base Health regen :9-18 Attack Damage: 0 Attack speed 0 Armor:0 Magic Resist: 0 Move Speed :350

Passive: Flow of the universe Aegir cannot auto attack and cannot heal unless on the fountain and takes 70% reduced damage from all source except towers and epic monsters when Aegir stops moving or their movement speed is reduced loses health at ( some fair ratio percentage) Aegir also gets 60% of the stats received from items and has no mana pool any abilities cast besides their ultimate that would kill them due to their cost do not kill them (aside from ultimate) Q: Diffusion/Flash Freeze Cooldown 11/10/9/8/7 Cast 50/60/70/80/90 Health Throws an ability in a small cone (500 range) that spreads for every enemy unit hit (up to 800 range) slowing everything is hits and dealing 20/30/40/50/60 (8-11% of her missing health) (+ 40% ap) based on rank Aegis can recast the Q Freezing the water after .75 seconds Freezing the water rooting all enemies within the cone (time to recast up to 2 seconds and root duration 1-1.5 second based on how long between final and initial cast)
W: Riptide Cooldown (40/37.535/25/22.5) Cost (100/150/200 health) at ranks 1/3/5 Aegis can travel through any water connected on the map after channeling for 1 second travel to target location (no this does not work from Topside River to bot side river only one river because they are not connected) E: Crashing Wave Cooldown( 14/13/12/11/10) Cost ( 15 health for each ally healed at all ranks) After a .25 second channel Aegir Dashes to in a straight line knocking all enemies hit aside and leaving a trail of water behind them healing all allies they dash through and speeding all allies who walk on the water( if they leave the trail of water the speed is removed). R: Splash! Cooldown (100/90/75) Cost (100% Hp at all ranks) Aegir freezes thereself and becomes untargetable and all champions around them (within 1100 range) slowing them and making them immobile after a .75 second channel they explode (killing themself) dealing (150/250/350) to all enemies around them and healing allies for ( Max Health divided by amount of champions hit (allies and enemies) ( this abilities negates the affects of Guardian angel and any item ( not ability) that would otherwise revive them) for each champion (enemy or allied) champion hit their death timer is reduced by 5% (maxing at 45%)

This part is mostly for RIOT or any interested in gender. I tried very hard to refer to Aegis with non gendered pronouns because having being made entirely of magical water i dont feel it fits the place to gender this being.