Assasin

League Of Legends Wiki - Champions - Assasin

An assassin is an agile champion that specializes in killing or disabling high value targets. Focused on infiltration,
deception, and mobility, assassins are opportunistic hunters who find favorable moments within a fight before jumping into the fray.
Regardless of the size of the enemy team, assassins specialize in positioning and artful killing. They strike when the time is right, no sooner, no later.

Assassins are natural opportunists, and prefer to strike when their targets are alone and vulnerable, rather than engage them in a direct assault,
favoring damage-oriented item builds to capitalize the most on their offensive capabilities.

A couple of Assasin champions are:
Ahri
Ekko
Fiora
Lee Sin

Ahri, The Nine Tailed fox. Her abilities are:
Orb Of Deception: A linear skill shot that returns to Ahri upon reaching maximum range.

Fox Fire: Ahri summons three spectral flames which orbit her, each flame pursues the closest visible enemy.

Charm: Ahri blows a kiss in a line, dealing magic damage to the first enemy hit and Charm them.

Spirit Rush: ( ult ) Ahri dashes in the direction of the cursor and fires up to three energy bolts that each pursue one of her nearest visible enemies.
Ekko, The Boy Who Shattered Time. His abilities are:
Timewinder: Ekko throws a grenade that expands into a time-distortion field upon hitting an enemy.

Parallel Convergence: Ekko splits the timeline, creating an anomaly that slows enemies caught inside.

Phase Dive: While charging up his Z-Drive, his next attack deals bonus damage and teleporting him to his target.

Chronobreak: ( ult ) Ekko shatters his timeline, becoming untargetable and rewinding to a more favorable point in time.
Fiora, The Grand Duelist. Her abilities are:
Lunge: Fiora dashes a short distance in the target direction, then stabs a nearby enemies.

Riposte: Fiora poises to strike in the target direction and then enters a defensive stance.

Bladework: Fiora's next two basic attacks gain bonus range and 50% bonus attack speed.

Grand Challenge: ( ult ) Fiora challenges the target enemy champion, highlighting all four of their Duelist Vitals for the next 8 seconds.
Lee Sin, The Blind Monk. His abilities are:
Sonic Wave: Lee Sin fires a sonic blast to the target, dealing physical damage to the first enemy it hits.

Resonating Strike: Lee Sin dashes to the enemy marked by Sonic Wave, dealing physical damage.

Safeguard: Lee Sin dashes to the friendly unit. they and Lee Sin receive a shield that lasts 2 seconds.

Iron Will: ( ult ) For 4 seconds, Lee Sin gains bonus life steal and spell vamp.