Got some free time during my university's vacations, upcoming birthday and country setting itself on fire to fully updating Izo's ability descriptions and details.
Be warned before hand of some minor changes to kit:
You'll see a few "X" values for elements that weren't set by your description, so you can fill them.
To avoid both clarity troubles and convoluted interactions, changed Vibrant Hoarfrost's damage to be autoattack damage from ability damage, so that Frozen Edge's description doesn't has the convoluted "non-basic attack related ability damage" or theorical convoluted/unfair interactions with other sources, otherwise works exactly the same.
Innate: Still a Fury system, however it works much like Renekton, although the Enraged version of abilities are more unique on its own cooldown (this means she can cast enraged Q without putting normal Q on cooldown, outside a gate of possibly 1 or 2 seconds to prevent spamming the two in succession).
Q is now does not cost Rage, instead being Sauna's main ability that'll grant her it.
Normal Q is more like a dash-AA, dealing one punch on the next AA.
Enhanced Q is much like current Q, dealing three instances of on-hit while going Master Yi.
W is either going to remain how it is, or change into the following:
Normal Q causes Sauna to mark a target, granting her a shield while gaining bonus MS when moving towards the target.
Enhanced Q has Sauna mark a target, nearsighting Sauna except for the target (and the terrain outlines), while gaining a strong shield and bonus MS when moving towards the target.
E now does not have Sauna "channeling." Instead knock-up is now 0.75 seconds default, and consumed Fury only increases damage. No more "hit nearby enemies" for normal.
Enhanced E causes Sauna to also damage nearby enemies, like default. Then, she follows up the knock-up with a Knock Down as she jumps with the target, slamming them to the ground to Stun them for a little longer. This means there is two instance of damage, instead of modifying the knock up damage any further.
R may activate instantly. Duration dropped to 10 seconds.
Her Rage meter remains full at all time, while reducing how often she can activate enraged abilities to 1.5 seconds.
Second activation is still an AoE, but also inflicts a decaying 75% slow for 1 second on enemies. It also Cleanses her, while making her immune to CCs for the next 1 second.