Domain Expansion

Creates a magical barrier with a 10-100ft. radius that can be broken by an attack from the outside that must make a dc 22 roll and deal at least 50 damage (can be built up over rounds). The inside of the barrier is an area described by the player (can be any aesthetic). When the spell is cast, every creature within 30 feet of you must make a dexterity saving throw with DC 18 or be sucked in to the domain. Additionally, you drop to 1 hp and use up all of your remaining spell slots, adding +1DC to the dexterity saving throw. While inside the domain, all creatures besides the caster take 1d4 elemental damage of the caster's choosing. Once the choice is made, it cannot be changed. All attacks hit, and dice is rolled to crit. You will crit if you roll the creature's armor class +5. Additionally, you gain +2 to your armor class and gain an additional action when the spell is cast. When the spell ends, you gain 1 level of exhaustion and are stunned for one turn. This spell cannot be cast more than once per long rest. If cast at a higher level, deal one extra d4 of elemental damage for every 2 levels of upcast. If cast at 8th level or higher, prevents all other creatures from moving for one turn and can exchange elemental damage for a status effect (sun, blindness, etc.) This status effect also cannot be changed once chosen.