Crystalline Air

Designate a point within 60 ft. that you can see. All air within a 50 ft. radius is rendered effectively solid to any creatures unless allowed by the caster. To allow certain creatures in, the caster can include them during the casting of this spell, or designate them later at any time.

The spell cannot be cast if its area includes any creatures larger than Tiny.

Creatures without permission will not be able to enter the solid air.

If a creature is inside the spell while its permissions are removed, the creature is rendered Paralyzed. Additionally, they cannot breathe. They must make a DC 20 Constitution saving throw at the start of their turn, or take 2d8 necrotic damage, unless the creature does not need to breathe.

All Dispel Magic and similar spells must roll a check when dispelling this spell, no matter the level.

For the purposes of attacking the ward created by this spell, the Crystalline Air has 15 AC and 50 health. When its health reaches 0, the spell is dispelled.

Additionally, only one Crystalline Air may be active at any one time.