Kuroko, the Shadow Serpant
Full AD Assassin that uses a katana.
Passive Serpent's Curse: Dealing physical damage marks targets. Dealing damage to marked targets grants 2% bonus lifesteal. Stacks up to 5 times.
Q: Shuriken ----- Throws a wave of shuriken. Procs lifesteal
W: Shadow Slash----- Dashes past target, slashing them and causing them to explode dealing physical damage in a small aoe and stunning for 1 second. Procs lifesteal
E: Serpent Strike----- Transforms into a shadow serpent, traveling across the ground to target location. Knocks up targets in a small aoe.
R: Devouring Serpent---- Passive: grants flat penetration when auto attacking a champion who has been fully stacked with serpent's curse. Active: Kuroko stabs the ground releasing shadow serpents that seek out enemies who have been marked by the curse. This ability knocks up targets, and deals damage based on how many stacks they have (stacks are removed from target). Procs lifesteal
Core items are Youmuu's Ghostblade, and Hydra. The goal is to stack up the passive, then use Youmuu's to mow them down. In team fights, the ult is used either to clean up after the fight, or to help CC. It should not be an overly damaging ability. This character is very squishy.