Enter Dreams

This spell allows the caster to enter a target's dream to present a message. Choose a creature(s) known to you as the target of this spell. Creatures that don't sleep, such as elves, can't be contacted by this spell. You may enter a trance state and enter that creature's dreams as the messenger. While in the trance, the messenger is aware of his or her surroundings but can't physically affect them or harm the target. The messenger may appear as monstrous, mystical, calming, or take any form you choose. If the target successfully makes their passive perception roll, he or she knows the form is an illusion but does not wake from the dream.

If the target is asleep, the messenger appears in the target's dreams and can converse with the target as long as it remains asleep, through the duration of the spell. The messenger can also shape the environment of the dream, creating landscapes, objects, and other images. The messenger can emerge from the trance at any time, ending the effect of the spell early. The target recalls the dream perfectly upon waking. If the target is awake when you cast the spell, the messenger knows it, and can either end the trance (and the spell) or wait for the target to fall asleep, at which point the messenger appears in the target's dreams. 

If you have a body part, lock of hair, clipping from a nail, or similar portion of the target's body, the target makes its saving throw with disadvantage.

At higher character levels, the caster may simultaneously project the same dream to multiple targets. Add one target for every spell level above 2.