Seiga is manaless.
Orianna's Command: Protect inspired her Q. Maokai's Sapling Toss & Karthus's Lay Waste inspired her W. Annie's Summon: Tibbers & Mordekaiser's Children of the Grave inspired her ult.
Every ten seconds, Seiga gains a distance buff. Each Distance buff gives seiga 30 attack range and gives her a buff based of the current stacks of distance.
Stack: Basic Attack fears for 1 seconds
Stacks: Basic Attack Reduces armor by 15%
Stacks: Basic attack snares for 1.5 seconds
Stacks: Basic attack slows by 25%
Stacks: Basic attack gives seiga 30% bonus movement speed and 15% bonus attack speed for 4 seconds.
Stacks of Distant Hermit are not wasted on Minions or monsters. Stacks 5 times.
Strange Orb Homing
COOLDOWN: 8 Seconds
Seiga fires an orb that homes in on an opponent. Anyone the orb touches while traveling take 45% of the damage and are stunned for 1.5 seconds. The actual target themselves are slowed for 4 seconds.
Seiga fires an orb to a target location. For the first second, if it finds an enemy, it doesn't deal damage, but instead fears. If it has lasted for more than 1 seconds it deals magic damage, which is doubled to isolated enemies.
Fear Duration: 1 / 1.5 / 2 / 2.5 / 3 Seconds
Magic Damage: 30 / 65 / 95 / 130 / 165 (45% AD)
Strange Orb Healing
Seiga begins to heal herself for 8 seconds. During this time, her basic attacks slow and deal extra true damage to minions. The slow decays over the span of 3 seconds. If the target is slowed due to Strange Orb Homing, the target is not effected by Strange Orb Healing's slow, but take half of the bonus minion damage, even if they're an enemy Champion
Seiga Summons Yoshika to do her bidding 30 seconds, dealing damage and snaring the target directly in the middle. Yoshika has 60% of Seiga's Attack Damage and Attack Speed, 80% of her Health, Armor, Magic Resist and Movement Speed. Every second, Yoshika deals physical damage around her. For every certain amount of damage dealt, Yoshika is granted 3 AD while Seiga is granted 5 AD.