Droweena's baleful mockery

The caster will begin laughing hysterically piercing through the silence spell and will be unable to take an action the next turn. Every humanoid or giant within 90 feet must succeed on a DC 15 CON saving throw or be afflicted with the old wounds reopening dealing 4d8 of the most recent of slashing bludgeoning or piercing and all non-magical lights within the range will be extinguished and Darkvision cant see through it.