Light Eater

False Appearance. While motionless indistinguishable from normal rock.

Light Absorption. When it starts its turn within 5 ft. of a source of light light is reduced while eater remains within 100' of light source. Bright light becomes dim and dim becomes darkness. If eater reduces light source's light to darkness eater sheds multicolored bright light in 20' radius and dim light for additional 20' for 1 hr and light source is extinguished if it is nonmagical flame or dispelled if it was created by 2nd level or lower spell.

Light Sense. Can pinpoint location of any light source within 100' of it and sense general direction of any within 1 mile.

Tentacle. Melee Weapon Attack: +4 to hit, 5 ft., one target, 5 (1d6+2) bludgeoning damage.

Emergency Flare (Recharges: Short/Long Rest). When it takes damage can emit brilliant flash of light. Each creature within 30': blinded 1 min (DC 12 Con negates). Blinded creature can re-save at end of each of its turns success ends effect on itself.