Sickening radiance

Sickening radiance was an evocation spell that filled an area with a searing light that drained the stamina of any creature standing within.

Effects
The spell illuminated a 30-foot-radius (9.1 meters) sphere centered at a visible point within a 120-foot (37-meter) range with a dim green light that lasted up to 10 minutes, as long as the caster kept concentrating. The light caused every creature within to shine in that same green light, revealing invisible creatures. Anyone caught in the light who was unable to resist the spell's effect suffered burns from the light and grew increasingly tired as long as they remained within. These effects lasted until the spell ended.

Components
The spell required only verbal and somatic components.