Darkness Manipulation – The ability to manipulate darkness/shadow.
Darkstar (Marvel) has this power (Official Handbook of the Marvel Universe V1 #3).
The Shade (DC) is a supervillain that controls a malleable extra dimensional darkness which he uses with deadly effect.
The Shroud (Marvel) creates a shadow that lacks mass and cannot be used to penetrate or bludgeon opponents (Official Handbook of the Marvel Universe V1 #10).
Shadow Lass (DC) has powers that are similar to the Shroud (DC Who’s Who V1 #20).
The Shi’ar Imperial Guard has Black Light (Marvel) can project black energy from his eyes.
Nightside (Marvel) is a doppelganger of Shadow Lass (Avengers West #81).
Mister Shadowpax – Pantheon #11 (Lone Star Press)
Drendari – Creature Collection I
Cloaker – D&D 3.5 – Monster Manual I
Shadow Lurker – TSR 2158 Monstrous Compendium Annual Volume 2
Shadow Mastiff – TSR 2166 Monstrous Compendium Annual Volume 3
Trading Card Games often allow the player to manipulate darkness.
Blanket of Darkness
Darkness Made by Malice
Darkness Shadow Bolt
Hands without Shadow
Shields of Darkness
Skin and Darkness Zealots
Next Darkness Mimicry