Weave the Elder-Sign

You trace an impossible sign from an alternate reality in the air inside a 30-foot cube within range. It glows for a short moment before vanishing. Each creature in the area who sees the sign must make an Intelligence saving throw. On a fail, the creature becomes Blinded and Stunned for the spell’s duration. On a success, a creature is Blinded until the end of your next turn.

The spell ends for a Stunned creature if it takes any damage, or if someone else uses an action to shake the creature out of its stupor. When the spell ends for a stunned creature, it takes 3d6 psychic damage.