Vell's Expansive Realm

You manifest a 60 ft radius hollow shadowy sphere centered on yourself. All creatures within 10 ft of the edge can choose to make a dexterity saving throw, if they succeed they can expend their movement to escape the sphere.
When the sphere has formed all creatures inside of it get transported to a demiplane that you create when you learn this spell, this demiplane cannot be entered by the demiplane spell.
On initiative count 20 all creatures of your choice take 6d10 damage (of a damage type you choose when you learn the spell) and has to make a wisdom saving throw against one condition from the list
(blinded, deafened, poisoned stunned, prone, restrained, frightened, none)(you choose when you learn the spell)
if you pick none the damage is increased to 9d10 damage
In addition you can pick an amount of spells or spell attacks up to your spellcasting modifier(minimum of 1) that will require no saving throws and no attack rolls as they will always take effect.
The spell can be ended at the start of your turn (no action recuired).
In addition when the spell ends you cannot cast any spells for an amount of minutes equal to twice the amount of rounds the spell was active, this can be cured with the greater restoration spell or a similar effect.