Dreamwalking

Dreamwalking (徒歩夢 Tohoyume) is both a Caster and Holder Magic that is related to the invasion and manipulation of dreams

Description
Dreamwalking is a form of Magic that allows the user to enter in and manipulate the dreams of the others. When someone sleeps, they enter in the World of Dreams (夢会 Yumekai), a realm of pure counsciousness generate by the collective minds of all those who are sleeping and that, immediately after the entrance of the dreamer, shapes itself to the mind of the user, generating their dreams and nightmares. Dreamwalkers can enter in the World of Dreams while awakened and can manipulate it with their will. It is generally used alongside Sleep Magic, but this is not a requirement for it's use

When using this magic, the Dreamwalkers can use the unsolid reality of the dreams to manipulate this world, becaming able to warp it's reality and laws freely. The more the imagination, the more effective this free control becomes. Without training, users perform this magic while sleeping, but trained users can invade the dreams while awakened. Time in a dream passes faster than in the waking world. Invading dreams, users have access to informations of emotions, thoughts, fears, memories and all their mind

It is also dangerous for some reasons, the main is because, when killed in a dream, the dreamer awakes, but when they are too deep inside the World of Dreams, their mind is obliterated in the proccess and they die before waking up

Side Effects
As said above, the main side-effect is that, if a dreamer is too deep inside their own mind and are killed, instead of awaking, their mind wil be obliterated and they will die before awaking. Also, another great side-effect is that, if this magic is performed consciently too much times, the user can end up losing the understand of what is dream and what is reality, believing the dreams are real and the real world is a dream. This can, eventually, drive them insane

Weaknesses
The main weakness is that it cannot induce sleep, and thus, many users employ it alongisde Sleep Magic to make it more effective. Also, that are some wards that can be placed on someone to turn them invulnerable to this power. Also, if the dreamer is made conscient in their own dreams, they can expel the invader at their own will