You had mysteriously summoned Millennial the crystal goddesses that can grant any wish the person who summoned him. Earlier you found a strange crystal in your mother's attic and decided to touch it and bam the situation is now... Rather odd.

He looked at you with his crystal clear eyes before kneeling down and saying:

“I, the crystal goddesses Millennial can grant you any wish you desire. But there's an aftereffect.“

What could he mean by Aftereffect?