expand domain

when you cast this spell you choose a number of hostile creatures equal to your spell casting ability within range, plus any number of friendly creatures 

all of the chosen creatures are teleport to an extra dimensional space known as your domain, this spaces physical attributes are chosen by the caster but remain the same between castings, 

while in your domain the sphere simulates 1 spell of 7th level or lower that has a duration longer than instantaneous, any hostile creatures caught in the dome automatically  fail any saving throws you force on them, and any attacks you make hit automatically