Champion Concept: Umbreene, the Lethal Maiden

Umbreene is an assassin that uses marks to target and assassinate enemies. I picture her using magic with one hand and a knife with the other.

Passive: Singled Target. Once every 90-35 (levels 1-18) Umbreene can mark an enemy after a one second delayfor 5-15 seconds (levels 1-18). This mark interacts with Umbreene's abilities. (Umbreene must be within 1000 units of an enemy to mark them). note: during delay enemies will see Singled Target mark forming.

Q: Shadowed Bladework Umbreene fires magic in a line dealing 35/55/75/95/115+(75% ability power) magic damage, if an enemy is marked Umbreene will dash to them and perform a plunging attack with her knife dealing 20/30/40/50/60+(135% attack damage) physical damage. range: 550 cooldown: 15/13.5/12/10.5/9

W: Umbral Folds: After a brief delay (in which Umbreene is slowed by 35%) Umbreene blinks either 500 units away or within 300 of an enemy marked with Singled Target. maximum blink distance: 1500 cooldown: 25/23/21/19/17

E: Darkening Empowerment passive: Large Monsters within 550 units are marked with Singled target, granting vision of them. Enemies will not be able to see this. Active: For Umbreene's next three basic attacks she gains 30/40/50% attack speed and 20/40/60/80/100+(25% ability power) bonus magic damage for each. (these attacks will deal 25% bonus damage to minions and large monsters.)

R: Final Blow Umbreene explodes Singled Mark dealing 50/150/250+(35% ability power)+(20/30/40% enemy's missing health). range: 350 cooldown: 50/45/40

Please note that this was rushed. Thank you!