League of Legends: Patch 9.8 notes breakdown

Kayn

"E – Shadow Step SHADOW ASSASSIN COOLDOWN :: 21/19/17/15/13 seconds >>> 8 seconds at all ranks"

I actually really love this change, as the previous cooldown will still apply to Kayn when he’s in Rhaast form. Now, Shadow Assassin will be more geared towards mobility and slipping into and out of fights. At 40% cooldown, he’ll have this up every 4.8 seconds, so this really ties into his identity of “I go in, kill you and get out” in this form.

Master Yi

"R – Highlander [NEW] PATRICK SWAYZE :: Master Yi can now move through units during Highlander"

I don’t think Master Yi really needed buffs given how strong he can be in soloQ (and how unlikely it is that he’ll ever be a meta pick in pro play), but now his ult just makes him a bit stronger.

Nautilus

"Passive – Staggering Blow ROOT DURATION :: 0.5/0.75/1/1.25/1.5 (at levels 1/6/11/16/18) >>> 0.75/1/1.25/1.5 (at levels 1/6/11/16)"

Buffing the root duration early just makes Naut more oppressive to lane against top lane, especially given the cooldown reduction they put on the root in Patch 9.6. It could also make him a bit stronger in the jungle.

"Q – Dredge Line DAMAGE :: 80/120/160/200/240 (+0.75 ability power) >>> 100/145/190/235/280 (+0.9 ability power)"

This buff isn’t quite as big, since Nautilus’s Q isn’t always used for engage and you’re not typically building any AP that would allow it to scale. Still, 20 extra damage early will help his all-in potential.

Ornn

"Passive – Living Forge FORGEFIRE CAPE :: Health increased from 625 >>> 750 and armor increased from 90 >>> 100 FROZEN FIST :: Armor increased from 95 >>> 125 INFERNAL MASK :: Health increased from 550 >>> 750 and magic resist increased from 90 >>> 100"

Some nice buffs to the upgraded items that Ornn can give his teammates. Wouldn’t say this really affects him since the items will only be bought and upgraded in a small number of cases.