True Shield

A globe of force surrounds the user as they protect themselves from damage.

Summon a shield with 40 temporary hit points, which takes the damage instead of you and lasts until the start of your next turn. Any damage over the total is then deducted from your hit points. 

If this spell is subject to a line spell and absorbs all the damage, the line spell ends. Any bolts from the spell magic missile are dissipated harmlessly. 

Casting this spell at 5th level or higher increases the temporary hit points of the shield by 10 for every level above 4th.