Uriel's Blood Ward

You carve a blood rune into each of you palms and hold out your arms to either side of you. As the blood flows from your hands, it quickly forms a 10 foot diameter crimson translucent dome around you and any other creature's you choose within the dome's radius. Any creatures within the dome's radius that are not allowed are pushed to the edge of the dome and if the target is medium or smaller they must make a Strength Saving Throw or be knocked prone. The dome can absorb up to 60 hit point worth of damage until destroyed. The dome only lets the chosen creatures to enter and exit the dome but, doesn't allow projectiles to be shot out at targets from within.

When you cast this spell using a spell slot of 6th or 7th level, the dome's radius becomes 15 feet, the dome's hit points increases to 80, and creatures of large or smaller now must make the saving throw. When you cast this spell using a spell slot of 8th or 9th level, the dome's radius becomes 20 feet, the dome's hit points increases to 100, and creatures of giant or smaller now must make the saving throw.