Devouring Darkness

Name Devouring Darkness
Cooldown at-will
Action standard
Duration concentration
Area circle 4
Special DC 21+
Range ranged
Save Con negates
Damage heavy necrotic
Power tenebrae
Class arcanist
Category Assault, Debilitation

At-will, standard action, circle 4, concentration, DC 21+; you create an area of entropic darkness that devours energy. The area is completely dark (as Darkness), and any creature that starts its turn within it or enters it for the first time on its turn must make a Constitution save or take heavy necrotic damage as warmth, light, and vitality are leeched away. On a successful save, they take half damage.