Thorn Shield

Thin and short spikes wreathe your body for the duration. You can end the spell early by using an action to dismiss it.

The thorns provide some level of protection, you reduce bludgeoning, piercing and slashing damage you take by 3.

In addition, whenever a creature within 5 feet of you hits you with a melee attack, the shield erupts with a burst of spikes. The attacker takes 2d4 piercing damage.

At higher levels. When you cast this spell using a slot of 4th level or higher, the damage reduction is increased by 1 and the damage is increased by 2d4 per level of the spell above 3rd.