If the target fails his Will save, you are able to enter his dreams any time he falls asleep during the spell’s duration. You are able to witness his dreams, and influence them if you wish, but the target is unaware of your presence. You can use the opportunity to remind the target of a task they should be working on completing, or a path they should be following. You can make a suggestion as the spell of the same name. The target gets a separate Will save to resist acting on your suggestion upon waking. You can make the sleeper’s dreams more pleasant, which will provide a better night’s sleep and the benefit of a +1 bonus to all saving throws for a full 24 hours after they wake. Conversely, you can turn the sleeper’s dreams into horrible nightmares, making for a poor night’s rest and leaving them with a -1 penalty to all saving throws for a full 24 hours after they wake.