Blood Wall

A small sacrifice to create confusion and chaos among the enemies. As an action, you may cut your hand, when you do so you create a wall of blood.

Whenever you cast the spell, any enemies inside the path of the wall will have to make a dexterity saving throw. On failure, the creature will take 2d8 necrotic damage, have 10 less feet of movement speed, and will make a constitution saving throw. If it fails the saving throw, it becomes poisoned unless it is immune to poisoning or until passes a medicine check. 

As you level up, this spell will deal 1d8 extra damage (5th level, 3d8 - 6th level, 4d8). At 20th level, any creature that is hit by the wall will not be able to move unless it passes a dexterity check.