Dream Peak

You gently lay your hand on the head of a sleeping creature to
glimpse its dreams or nightmares. The target must make a Wisdom
saving throw. On a successful save, you are unable to see into the
target’s dreams. On a failed saving throw, the target remains asleep
and you experience the dream as the target is experiencing it. A
willing creature who knows you will cast this spell on it while it
sleeps can choose to fail its saving throw.
You can’t change the events in the dream, but you feel any
emotions that the target feels while it is dreaming. The GM
determines the content and coherence of the dream.
After the creature wakes, it knows that you were peering into its
dreams if it failed its saving throw.