Door Stuck!

You infuse malicious magical energy into a nonmagical door that you can see within range, causing it to open and set a trap. 

The trap triggers when a creature of equal or lesser size moves through the door. The creature must make a Dexterity saving throw or be pinned between the door and the door frame as the door slams shut on them. The creature takes 3d8 bludgeoning damage and is restrained on a failed saving throw. A restrained creature can make a Strength saving throw as an action of each of its turns, ending the effect on itself on a successful saving throw.