
Passive
Umbra Blades
Every few seconds, Nocturne's next attack strikes surrounding enemies for bonus physical damage and heals himself. Nocturne's basic attacks reduce this cooldown.

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Riot Data Dragon 16.20.1. Base values before items, runes and bonuses; independent of match-data filters.
Base-game reference only. Mode-specific balance changes and augments are not included.
Official short descriptions · Data Dragon 16.20.1
Base-game reference only. Item, rune and mode-specific adjustments are not included.
This reference covers the passive and four ability slots. Alternate forms and full damage calculations are not covered.

Passive
Every few seconds, Nocturne's next attack strikes surrounding enemies for bonus physical damage and heals himself. Nocturne's basic attacks reduce this cooldown.

Q
Nocturne throws a shadow blade that deals damage, leaves a Dusk Trail, and causes champions to leave a Dusk Trail. While on the trail, Nocturne can move through units and has increased Move Speed and Attack Damage.
Base values from ability rank 1 upward.

W
Nocturne empowers his blades, passively gaining Attack Speed. Activating Shroud of Darkness allows Nocturne to fade into the shadows, creating a magical barrier which blocks a single enemy ability and doubles his passive Attack Speed if successful.
Base values from ability rank 1 upward.

E
Nocturne plants a nightmare into his target's mind, dealing damage each second and applying fear to the target if they do not get out of range by the end of the duration.
Base values from ability rank 1 upward.

R
Nocturne reduces the sight radius of all enemy champions and removes their ally vision in the process. He can then launch himself at a nearby enemy champion.
Base values from ability rank 1 upward.