4th-level Spell: Wall of Blood

Sorcery (Conjuration)

You manifest some of your blood into a barrier on a solid surface you can see within range. You can make the wall up to 60 feet long, 20 feet high, and 5 feet thick, or in a ring up to 20 feet in diameter, 20 feet high, and 5 feet thick. The wall is opaque and lasts for the duration. Moving through the wall costs 3 feet of movement for each foot traveled.
Any creature entering the wall must make a Constitution saving throw, suffering 3d8 necrotic damage on a failure or half as much on a success. When a creature enters the wall, you can expend 2 hit points to increase the necrotic damage it would take by 2d8.
Source: SMS

• Casting Time: 1 action
• Range: 60 feet
• Components: S, M (a splash of your blood worth at least 4 hit points, which the spell consumes)
• Duration: Concentration, up to 10 minutes
• Ritual: No