Defraction

You reach out to an area you can see within range and alter the way magic travels to or around their intended target(s), creating a 20 ft radius cube of distorted and fractured physical space as the magical energy in this area becomes warped and waned by you.

When a creature is targeted by a spell attack while within the affected area, the attacking creature must make the attack roll with disadvantage. The same applies to creatures within the affected area attempting to make a spell attack against other creatures, in or out of the affected area. If a spell is cast (into or out of) the affected area that would require a saving throw, the targeted creature(s) make their saving throws with advantage.

Creatures that attempt to teleport or leave the Material Plane while in the spell’s affected area must succeed on a CON saving throw. On a failure, the creature’s attempt fails and they take 4d6 force damage.