Bloodspine Burst

You unleash long, spear-like, barbed lances of blood from your entire body, omnidirectionally. Every creature within a 15ft radius of you must make a DEX saving throw or receive 6d6 Piercing damage and have your movement reduced by 15ft, or halved damage on a success. By casting this spell, you inflict 1d4 Necrotic damage upon yourself. 

At higher spell slot levels: At 3rd level, this spell has 20ft of range and an additional 1d6 Piercing damage and can be cast as a Reaction, but requires another 1d4 Necrotic damage to be self-inflicted. At 4th level, this spell can be cast in a single direction in a linear, 60ft path, with the same effect. The spell can pierce multiple targets.