Domain of Fear

The Domain of Fear is a kind of personal demiplane created by the caster, a realm where your power is heightened. You choose an intelligent creature you can see within range of the spell, directing a psychic beam against it. The creature must make a Charisma saving throw. On a failure, the creature falls into a kind of trance. On a success, half the mana cost is refunded and the target becomes immune to this spell for 10 minutes.

While in the trance, the creature’s mind is moved into the Domain of Fear, where time passes differently: 10 rounds within this domain is equivalent to 1 round outside it. An illusory replica of the target is created within this demiplane, possessing the creature’s current hit points and any abilities it has, though this replica has no equipment.

You can move your mind into this domain for the duration of the spell; when you do, a replica of yourself is created within the domain, possessing your current hit points and all your abilities, as well as a duplicate of all your equipment. While in the Domain of Fear, all your spells have their cost reduced by half (minimum of 1). For the duration, all damage you deal in combat to a target within the domain is converted to psychic damage.

If you manage to reduce the target to 0 hit points within this domain before the spell ends, the target dies instantly. If you fail to reduce the target to 0 hit points, the trance is broken and the target takes only 1/4 of the psychic damage dealt within the Domain of Fear and gains 1 level of exhaustion. If you are reduced to 0 hit points within this domain, the spell ends and you gain 1 level of exhaustion.