Wall of Bone

You cause a wall of massive bones to rise out of the ground within range. You can form it into a hemispherical dome or a sphere with a radius of up to 10 feet, or you can shape a flat surface made up of five 5-foot-square panels. Each panel must be contiguous with another panel. In any form, the wall is 1 foot thick and lasts for the duration. Each section of the wall is an object with an armor class equal to 10 + your Constitution modifier. The wall's Hit Points are tied to your life force. To calculate the wall's Hit Points, roll one of your Hit Die and add your Constitution modifier. The wall blocks line of sight and provides 3/4 cover to creatures behind it.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the Armor Class increases by 1 point and the Hit Points increase by 1 point for each slot above 1st.