Zeal a grand wizard of immortality, created a spell to help aid friends while he focused on other things.

You send out a 5ft tall, 5ft thick, and 15 ft wide on a place you choose within 90 ft. This Shield has an Ac 15 and 50 hp. You can choose creatures who can pass through and send objects through the field. While acting as a solid wall to anyone else.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the Hit points increases by 50 for every two slot levels above 2nd.