Seira, The Spectral Stalker
Quiver of Souls (innate):
Whenever an enemy unit dies near Seira, she has a chance to forge their soul into an arrow for her quiver over 3 seconds. This arrow causes her next auto-attack to deal additional damage and cause the afflicted enemy to gain a stack of Unnerved. Enemies that Seira herself kills, enemy champions, and large and epic jungle monsters are guaranteed to become arrows. Seira can carry a maximum of 10 arrows at a time.
Every stack of Unnerved causes the target to have reduced attack speed. At 3 stacks, the target is Feared for 1 second.
Shatter Soul (q):
Seira calls upon Taw to gather more souls. After a brief delay, target enemy takes damage. If this ability kills a unit, it's cooldwon is refreshed and Seira gains 2 arrows for her quiver.
Magic Arrow (w):
In order to use this ability, Seira must have at least one arrow in her quiver. Seira prepares different spells to enchant her arrow, cycling between the two. Activating this ability again selects the spell, causing Seira's next auto-attack to have one of two effects:
Acid Arrow (Green): Seira beseeches Taw to empower her next arrow with acidic properties, causing her next auto-attack to deal additional damage and reduce the enemies armour for 2 seconds.
Seeking Arrow (Yellow): Seira beseeches Yuni to empower her next arrow with hunting magic, causing her next auto-attack to have additional range and to ignore blind and dodge.
Hunting Shadows (e):
Seira calls upon Yuni to help track her foes. Seira gains an increased sight radius for 2 seconds, and can see enemy champions in bushes without having to enter the bush.
Twin Shot (r):
Seira calls forth Taw and Yuni as she lines up a mighty shot, channelling for 1 second, before launching both spirits in target direction. The two spirits will spiral around the arrow, alternating which spirit is on which side every 0.5 seconds. If an enemy is struck by the arrow, Taw, or Yuni, they take damage. Taw and Yuni are never on the same side of the arrow at the same time.
Enemies stuck by the arrow take the most damage. Enemies struck by Taw (green spirit) have their armor reduced for 2 seconds. Enemies struck by Yuni (Yellow Spirit) are knocked back a short distance. If an enemy is struck by all three, the damage is greatly increased.
Upon reaching the end of this abilities range, Taw and Yuni will split off on either side and return to Seira in a wide arc, damaging and applying their effects to all enemies in their path. Seira can activate this ability to cause Taw and Yuni to split off early. While Taw is not within Seira, she cannot use Shatter Soul and the Acid arrow. While Yuni is not within Siera, she cannot use Hunting Shadows or the Seeking Arrow.
Bam. Name and kit. This more or less what you were thinking? Let me know! :)