Baneful Light (3.5e Maneuver)

''The light! It burns!!!''

Make a normal melee attack. In addition to damage, the target must make a Fortitude save or become very dangerously sensitive to sunlight, taking your Charisma modifier in damage at the beginning of their turn every round they are in normal lighting conditions (and double this amount when in unusually bright light or exposed to [Light] spells that deal damage). They also gain the light sensitivity creature ability. If they already have it (including by the curse of the night maneuver, they are instead blinded instead of dazzled.

Creatures which already possess a weakness to sunlight, such as wraiths, now treat any light source as if it were daylight.

A successful saving throw still deals normal damage, and reduces the effect to 1 round.