Domain Expansion

 Placing your hands together and muttering the words "Domain Expansion", you conjure an spherical impenetrable barrier 200 feet in radius, centered on your location at the moment of casting. Any attempt to enter or exit this barrier requires you to succeed on a DC 25 Strength check.

This Domain lasts until the duration ends, you dispel it with a bonus action, nobody except you is in the domain, or someone casts Domain Expansion with a higher level in the spell slots (see material components) and it overlaps your domain. Consult the following table to check how long your domain lasts when this happens:
Duration Ends, dispelled, or only you are in the Domain: Immediately
No difference in spell slots: Both domains overlap, dispelling one will dispel the other
1-5 spell slot difference: The weaker Domain ends 3 turns after the newest Domain is casted
6-10 spell slot difference: The weaker Domain ends 1 turn after the newest Domain is casted
>10 spell slot difference: The weaker Domain is immediately dispelled

You can imbue the space within the barrier with a prepared spell of 3rd level or lower, targeting everything within the barrier (with the exception of you and designated non-targets) with the imbued spell every turn. Spells that deal damage in this manner do all damage rolls with disadvantage and will be cast with a level 3 spell slot. If the spell affects an area, the area is centered on that target. If the spell summons hostile creatures or creates harmful objects or traps, they appear as close as possible to the target(s) and attack it. If the spell requires concentration, it lasts until the end of its full duration, or until the end of the Domain Expansion.