From Riot's release announcement for the Kassadin champion update:
"Kassadin’s all gussied up and about ready to Riftwalk out of the champion update workshop!
Similar to the updates we applied to Singed and Maokai at the tail end of last year, we’re giving Kassadin a visual-only brush up to his base model and skins. That means a new model and textures, plus a whole new set of animations, visual effects and spell effects. We’ve reworked his blade, too, so now it looks a little sharper while costing a bunch less in terms of resources. Even the Void loves toasters.
Let us know your thoughts in the comments below!"With that out of the way, let's Riftwalk into a better look:
790 RP or 3150 IP
In addition to the model and texture updates, Kassadin also has tweaked visual effects and new animations!
In addition to all this, each of his skins has also been updated:
Deep One Kassadin