You use your knowledge of necrotic powers to create 3 astral copies from yourself into the material plane, these copies can act as attackers/defenders on behalf of the caster. Each of these copies has a quarter the heath of whoever cast it, each of these projections mirror the caster in resemblance as well as keeping the casters speed. Each can make one material attack against a target dealing 1d8 bludgeoning damage.
While the caster is concentrating their eyes roll into the back of their head sending them into an almost catatonic state. The caster can proform no other spells or actions the copies do so in your place, therefore any melee attacks against the caster are critical hits.
The caster can summon one extra projection every 3 spell slots. level 6 = 4 and so on