I would suggest to continue Project skinline for AD assassins.
Yasuo got one and it is nice. What about Project Zed/Talon?
Project Talon: Armor is metallic gray with neon blue as linings, Hood is like Crim. Elite Talon but gray/blue.Cape is chains with the usual blades(glowing with blue). Weapon is metallic gray with little glow of blue. Shurikens are purely metal with the outline of blue.
Q - Makes his weapon glow brightly blue. If hits, Square particles burst out of the target, same bleed.
W - Hits small square particles per enemy hit.
E - Leaves square particles on point of cast, Target burst some of them too.
R - Same with W, no explanations. Maybe leave a trail of shurikens when going in and out.
Project Zed:. Armor same gray but bright red/crimson instead of blue/orange. Each of his weapon has 2 blades right? One blade is metal the other is digitalized red/black design. Shurikens same with Talon except red outline and leaves black trail when flying.
Q - Each enemy hit burst square particles.
W - Shadow is pure black with some red square particles on it. Shadow Q is pure black, red outline. Shadow E is the same with normal E.
E - The particles would be how Yasuo triggers his tornado, nuff said.
R - Same effects, target bursts Square particles when mark explode