Thicken

Pulling at threads from the timestreams, you create a time-locked wall at a point that you can see within range. You can make the wall up to 20 feet long, 10 feet high, and 1 foot thick or you can make a ringed wall up to 5 feet in diameter, 15 feet high, and 1 foot thick. The wall is seamless to the eye, and nothing can pass through it from either side. A creature that uses its action to examine the wall can determine its size with a successful Intelligence (Investigation) check against your spell save DC. If a creature discerns the wall for what it is and can make their way around it. No sound can pass through it.

If cast in a creature's space then the creature is pushed 5 feet away from the caster without taking any damage.

Nothing can physically pass through the wall. It is immune to all damage but can be dispelled by dispel magic.