Domain Expansion

A 30 ft radius sphere centered on the caster springs into existence, it lasts until dismissed by the caster. The sphere cannot be seen through, and no one inside the sphere can leave it. However, creatures outside the sphere can enter it with a successful Strength (Athletics) check determined by the caster's spell save DC. Additionally, the terrain inside the sphere takes on an appearance that is determined by the caster the first time they cast this spell. All creatures inside the sphere who are hostile to the caster have their AC set to 0 and automatically fail all saving throws. Counterspell and Dispel Magic spells against this spell automatically fail. If this spell is cast from two sources and the spheres intersect, the casters make a contested check using their spell ability modifier. The loser of this contest has their Domain Expansion instantly dispelled and are dragged into the radius of the winner's. If this contest is made and one of the casters is casting this spell with a higher level spell slot than the other caster, they automatically win the contest.