Demonbade Yasuo and Angelblade Riven

So I was just on surrender@20 and I saw the two "mysteriously matching" icons which I realized looked like one had angel like wings around the sides and the other had a demonic look to it so i thought "omg this must be for the new yas and riven skins" and then I scrolled down and saw the picture that is related to the icons and in the picture it is clear that they are Angelblade Riven and Demonblade Yasuo! I am so excited for those skins, i will literally dumb the money in for however much the yasuo one costs