It's been time to give us the True elder's killer of Yasuo Story: Sasaki Kojiro

Since is pretty much a reference to Miyamoto Musashi, why not create his TRUE rival now, the pieces are all layed... The "Sasaki Kojiro" could've been an old student of the wind technique school, butthurt about something in the past, and seeing the Noxian invasion as a opportunity to exact revenge on the Elder that denied him something, he uses the invasion as a way to sneak into the temple and assassinte the elder while everyone was busy fighting invaders . When see a using her Broken Wings, he comments about "Three Swift Strikes" and he recognizes said technique maybe because one older student knew such skill, which ties with Sasaki Kojiro's famed sword technique, the Swallow Return/Reversal, also knows as Tsubame Gaeshi, where Sasaki Kojiro trained day and night trying to strike a swallow mid flight with his sword, coming with a technique that "caged" the creature between three fast attacks with his sword. Give said new champ the Monohoshizao, a very long katana (blade lenght over 90 cm/2 feet and 11.5 inches), make a style of long, but slow poke champion with skills that could be a paralel to Yasuo, since both "could've" been trained under the same school of swordplay, with the ultimate being the Tsubame Gaeshi, and the conclusion to Yasuo search for the true killer would be pretty much gold.