Went with AC 14, no darkvision,
Updating the
Boalisk.
It should have "blindsight 10 ft." not "blindsight 10" in
Senses.
The Glare's wording can be honed a bit:
Glare #2. The boalisk targets one creature it can see within 30 feet of it with its Rotting Gaze (see above). If the target can see the boalisk, it takes 10 (3d6) necrotic damage and contracts the rotting curse. If the target succeeds on a DC 12 Constitution saving throw it takes half damage and is not cursed.
My idea was its Glare can affect creatures that "avert their eyes" from casual contact because the boalisk is trying to manoeuvre to meet their eyes, so I guess we should allow for that aspect too.
Still, averting their eyes should offer some benefit. How about advantage on the save?
Thus:
Glare #3. The boalisk targets one creature it can see within 30 feet of it with its Rotting Gaze (see above). If the target can see the boalisk, it takes 10 (3d6) necrotic damage and contracts the rotting curse. If the target succeeds on a DC 12 Constitution saving throw it takes half damage and is not cursed. Targets that averted their eyes from the Rotting Gaze gain advantage on the saving throw.
I like
Glare #3 the best of those tweaks.
BAM another plot hook for a magic item...the brille
So shall we modify Rotting Gaze so boalisks and constrictor snakes or all snakes are unaffected?
i.e.:
Rotting Gaze #2. If a creature other than a boalisk or snake starts its turn within 30 feet of the boalisk and the two of them can see each other, the boalisk can force the creature to make a DC 12 Constitution saving throw if the boailisk isn't incapacitated. On a failed save, the creature takes 10 (3d6) necrotic damage and contracts a magical rotting curse.
OR
Rotting Gaze #3. If a creature other than a boalisk or constrictor snake starts its turn within 30 feet of the boalisk and the two of them can see each other, the boalisk can force the creature to make a DC 12 Constitution saving throw if the boailisk isn't incapacitated. On a failed save, the creature takes 10 (3d6) necrotic damage and contracts a magical rotting curse.
Of those, I lean towards the all-snakes
Rotting Gaze #2, but would go for
#3 if you prefer it.