Domain expansion

You summon a black, floating sphere, impossible to see through, with a diameter of 50 ft in which you don't have to roll to hit.  You have three attacks. Your domain expansion must be related to your character in some way and it must have a fitting name.

Any saving throws for the caster are with advantage. Any saving throws for attacked automatically fail. If someone attacks you while you are in your domain and they're not, they have double disadvantage on the attack. On the contrary, if they attack your sphere, they have advantage on the hit. The sphere has 13 HP and an AC of 12 if you're level 17 and an AC of 14 if you're level 20. Defeat of the sphere doesn't mean death of it, but rather an opening in it, big enough for any being of the size category large and smaller to enter. The domain expansion can be ended by another domain expansion by an enemy of higher level or unconsciousness of caster. The domain expansion can't be left by any other means.

The domain expansion automatically hits and teleports an enemy that is at most 50 ft away into it. Every domain expansion is unique and because of that, attacks in it deal magical damage and base damage kind, no matter the attack.

Once used, it takes two sorcery points.