Cloak(Investiture) of Darkness

Until the spell ends, flame-like shadows wreathe your body causing you to become heavily obscured to others,  and you gain the following benefits:

• You are immune to necrotic damage and have resistance to radiant damage.

• The shadows turn dim light within 30 feet of you into non-magical darkness, and bright light in the same area to dim light. 

• Yourself and allies within a 30 feet appear to teleport when they use their movement within this radius they appear to teleport, you and they can use a bonus action to take the disengage action.

• Whenever a creature within 10 feet of you hits you with an attack, the shadows lash out at that creature, dealing it 4d6 necrotic damage.