The call Of Wizards

This Spell calls to all wizards of good, evil or both, your message must be less than 200 words. Each person who receives the messages has the choice to ignore the call or, be instantly transported through one of the many refracting edges of the diamond to the spell-caster.The caster must succeed on a dc17 wisdom saving throw or have their mind shattered and, each person with in 100ft takes 60 damage no resistance or immunity can be applied. The caster can only be brought back to sanity by a wish spell.