Domain Expansion

You create a reality-warping pocket dimension that manifests as an expression of your own power. The domain forms a spherical boundary with a radius of 60 feet, drawing creatures within its area into a separate reality.

When you cast this spell, every creature other than you within the initial area must make a Dexterity saving throw against your spell save DC.

• Failed Save: The creature is transported into the domain.

• Successful Save: The creature remains outside the domain and is pushed to the nearest unoccupied space outside its boundary.

You and every creature that fails this saving throw are transported into the pocket dimension. The domain's appearance is determined by you, although its terrain and mechanical properties cannot be altered.

Domain Effects

Immediately after creatures are transported into the domain, each affected creature other than you must make a saving throw determined by your selected Domain Type. On a failed save, the creature takes 8d6 damage of the corresponding damage type and suffers the domain's additional effect. On a successful save, it takes half damage and suffers no additional effect.

At the start of each affected creature's turn, it must repeat the domain's saving throw. On a failed save, it takes 4d6 damage of the corresponding damage type and suffers the domain's additional effect. On a successful save, it takes half damage and suffers no additional effect.

You are immune to the damage and additional effects of your own Domain Expansion.

Domain Boundary

The domain is separated from the surrounding reality by a magical boundary with the following properties:

• Armor Class: 20

• Hit Points: 300

• Damage Threshold: 20

• Damage Resistance: All damage types except poison and psychic.

• Damage Immunities: Poison and psychic.

The boundary can only be damaged by creatures and effects originating outside the domain. It automatically succeeds on saving throws against external effects. Any effect that cannot damage objects cannot damage the boundary.

The damage threshold means that an individual instance of damage must deal at least 20 damage to affect the boundary. Damage that meets this threshold is then subject to the boundary's damage resistance.

If the boundary is reduced to 0 hit points, the spell immediately ends, and all creatures inside the domain return to their corresponding locations in the reality from which they were transported. If a corresponding location is occupied, the creature appears in the nearest unoccupied space.

Restrictions

While inside the domain:

• Creatures cannot leave the domain through ordinary movement.

• Teleportation and other magical transportation effects cannot transport creatures across the boundary.

• This restriction includes Plane Shift, Etherealness, and other methods of planar transportation.

• Creatures cannot enter or leave through the Ethereal Plane.

• Creatures inside the domain do not need to breathe.

• Creatures inside the domain cannot be detected or perceived through Divination magic.

The caster can leave the domain at any time, but doing so immediately ends the spell.

Ending the Spell

The spell ends if its duration expires, the caster loses concentration, the caster leaves the domain, or the boundary is destroyed.

The domain can also be ended by Dispel Magic cast using a 9th-level spell slot or higher. More powerful magical effects, including Wish and Divine Intervention, can also end or override the domain at the DM's discretion.

Domain Clashes

If another creature casts Domain Expansion while an existing domain is active and the two domains overlap, a Domain Clash occurs.

Both casters roll a d20. The caster with the higher result wins, and their domain overrides the opposing domain. The losing domain immediately ends.

If both casters roll the same result, both domains collapse and both spells end.

Domain Types

When you learn Domain Expansion, choose one of the following eight Domain Types. This choice is permanent and determines the damage type, saving throw, and additional effects of your domain.