Dragon blight

Dragon blight was a spell that was used against dragons.

Effects
When cast, a shimmering green cloud enveloped a target dragon. The dragon, and any other dragonkind within the cloud, experienced excruciating pain, a pain so intense that any creature within was left stunned after the spell expired.

Components
This spell required verbal and somatic components. However, if the caster included a claw from a deep dragon while casting the spell, it increased the likelihood of the spell stunning the targeted dragon.