Defensive Dome

A dome of force 20 feet in diameter with 25 hit points springs into being, centered on you. The dome protects against damaging effects from outside of it until its hit points are reduced to zero, at which point excess damage carries over onto creatures and objects inside the dome. The dome then disappear immediately.

The dome can not block any creature from entering or leaving its area.

At Higher Levels: When you cast this spell using a spell slot of 3rd level or higher the diameter and hit points of the dome all increase by 10 for each spell slot above 2nd.