Arcane Brainstorm

When you cast this spell, you establish a telepathic link between yourself and a number of other creatures up to your INT modifier. An unwilling creature can attempt an intelligence saving throw against your spell save dc to prevent the connection.

For the duration, whenever a linked creature would make an Intelligence Check, it uses the sum of all linked creatures’ INT modifiers instead of its own modifier. As long as at least 1 of the linked creatures is proficient in an INT skill, all linked creatures are considered proficient with that skill.