Talibo's Taunt

Talibo's Taunt is a spell created by the gnome jester himself in order to make his games more fun. The spell summons a necrotic fire with a chance to mess with ones mind. It creates a cross shaped area of purple flame from up to 40 feet of the spell-caster, and anyone within the area of the spell must make a Dexterity saving throw, taking 1d8 necrotic damage or half as much on a successful one. It then forces all creatures affected to make a charisma saving throw, taking 1d8 psychic damage or none on a successful one,  however the latter only applies to creatures with intelligence of 4 or higher.