Necrotic Gaze. If a creature starts its turn within 30 feet of the necrolisk and the two of them can see each other, the necrolisk can force the creature to make a DC 12 Constitution saving throw if the necrolisk isn’t incapacitated. If the saving throw fails by 5 or more, the creature is reduced to 0 hit points, unless it is immune to the frightened condition. Otherwise, a creature takes 16 (3d10) necrotic damage on a failed save.

A creature that isn’t surprised can avert its eyes to avoid the saving throw at the start of its turn. If it does so, it can’t see the necrolisk until the start of its next turn, when it can avert its eyes again. If it looks at the necrolisk in the meantime, it must immediately make the save.

Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 10 (2d6 + 3) piercing damage plus 7 (2d6) necrotic damage.

Tail. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 10 (2d6 + 3) bludgeoning damage.