Shadow Doppelganger

Level: 8th-level Conjuration

Casting Time: 1 action

Range: Self

Components: V, S, M (a mirror fragment)

Duration: Concentration, up to 10 minutes

Description: You create a shadowy replica of yourself. The doppelganger mimics your actions, including casting spells and attacking. It has half of your hit points and takes damage independently. If destroyed, it dissipates into shadow. You may command it using your bonus action.