A cool idea for kayn imo

What if when kayn transforms into shadow form, he will use energy since he will be a ninja, but when you go rhaast he will use (whatever tf you can think of as long as it is red)? I think it will bump both the learning curve and how fun the champ is by a bit, and fit the lore since both groups are manaless for some reason. I understand it if they thought about it but didn’t put it in for gameplay reasons, but at least it’ll look fun. Here’s my idea (it is just for creativity and fun)

Added Shadow assassin passive: when you are in your ult you regen 3x the energy you will be getting normally, when you are at full energy when you ult out, you deal execute damage. (Rewarding players for staying inside longer instead of just dodging one ability, comes at the risk of getting gangbanged since enemies will have time to reposition)

Added Darkin passive: You charge up your blood well (yep, that thing that aatrox has) when dealing damage, it will slowly decomplete to give you health back (as opposed of just healing from spell damage), the fuller the bar is, the faster it drains. When inside your ult, you heal 3x as much over time from your passive, and ulting out deals bonus damage based on how much blood charge you have left (you can either stay in longer for healing, or ult out with almost a full bar for damage)