Departure from flesh

Necrotic energy ripples through you, flaying the skin from your arms and legs. Immediately after casting this spell you take 1d4 slashing damage multiplied by your constitution modifier. While this spell is in effect you are subject to the following effects:

• Your movement speed is increased by 20.
• Should you deal damage while in this state, the damage is doubled and the damage type is changed to necrotic.
• Should you take damage while in this state, the damage is also doubled. (damage dealt to yourself via this spell is not doubled)
• At the start of your turn you take 1d4 slashing damage multiplied by your constitution modifier. 

When this spell ends the skin flayed from you returns to your body and regain 1d10 hit points.