Antiundead Shell

A shimmering barrier extends out from you in a 10-foot radius and moves with you, remaining centered on you and hedging out all undead creatures. The barrier lasts for the duration.

The barrier prevents an affected creature from passing or reaching through. An affected creature can cast spells or make attacks with ranged or reach weapons through the barrier. The barrier also has 80 HP and can be attacked via the undead to disable it. There is no AC, it is an automatic hit.

If you move so that an affected creature is forced to pass through the barrier, the spell ends.

The spells radius extends 5 ft for every higher level cast, and gains 5 HP.