Domain Expansion

You create a demi-plane centered on yourself. The maximum size of said domain is a 350 ft. cube centered around you. To those outside of the spell, the domain looks like an opaque circular orb that is 10x10 feet in diameter. The demiplane looks like however the caster wishes and while inside your domain, you have ultimate control over both the space and what you are capable of within the space. You can choose any number of creatures within the domain that you can see to be immune to and benefit from the same effects as the caster.

While within the domain, the following effects are always active:

• All attacks made against you are made with disadvantage and the resulting roll takes -5 to the result, potentially turning a success into a failure.
• When you make an ability check or saving throw, you do so with an advantage and take a +10 to the result.
• All attacks made by you are guaranteed to hit regardless of the target's AC.
• Your domain is warded against divination magic. Any attempts to use spells or abilities in that category that are targeted at or inside your domain automatically fail.
• The domain counts as difficult terrain for those inside aside from you.
• You automatically succeed on concentration checks for your spells.
• You can concentrate on one additional spell that requires concentration while within the domain.
• Spells cost one less slot to cast (Ex: 1st level spells can be cast as cantrips, 9th level spells can be cast as 8th level, ect.)

If two beings cast this spell in the same area, the two beings must make a contested spell-casting modifier check to see whose domain remains intact.

If a creature from the outside attempts to enter the domain, it must make a Strength check. On a failure, they take 12d12 Force damage and are repelled 30 feet. If a creature from the inside attempts to escape, they must make a Strength check with disadvantage. On a failure, they take 12d12 Force damage and are repelled 60 feet.

This spell cannot be dispelled in any way other than by the caster, so spells such as Counterspell or Antimagic Field cast against this spell automatically fail. Otherwise, the caster can choose to end this spell as a bonus action.

the spell can only last up to 3 minutes (30 rounds) and 9th level (unlimited time at 20th level) and once the spell is released the user takes 1 point of exhaustion per minute used unless they are 20th level than its every 15 rounds