the Shadow ReaperFighter Assassin
A peerless practitioner of lethal shadow magic, Shieda Kayn battles to achieve his true destiny—to one day lead the Order of Shadow into a new era of Ionian supremacy. He wields the sentient darkin weapon Rhaast, undeterred by its creeping corruption of his body and mind. There are only two possible outcomes: either Kayn bends the weapon to his will... or the malevolent blade consumes him completely, paving the way for the destruction of all Runeterra.
The Darkin Scythe (KaynP)
Kayn wields an ancient weapon and fights Rhaast, the darkin within it, for control. Either the Darkin will triumph, or Kayn will master Rhaast and become the Shadow Assassin.
Darkin: Heal for a percentage of spell damage dealt to champions.
Shadow Assassin: For the first few seconds in combat with enemy champions, deal bonus damage.
Reaping Slash (KaynQ)
Kayn dashes, then slashes. Both deal damage.
Blade's Reach (KaynW)
Kayn damages and slows targets in a line.
Shadow Step (KaynE)
Kayn can walk through terrain.
Umbral Trespass (KaynR)
Kayn hides in an enemy's body, dealing massive damage when he bursts out.
Umbral Trespass requires Kayn to damage a target first. Try to dodge Blade's Reach to deny him a long range cast of Umbral Trespass.
When Kayn is in terrain near you, you will get a visual warning on the edge of the terrain he's in.
Damage Kayn while he's in Shadow Step to shorten its duration, or apply hard crowd control (stun, charm, knockup, etc) to end Shadow Step immediately.