Ashe's Temporary Asylum

A 10-foot-radius immobile dome of transparent force springs into existence around you and remains stationary for the duration of the spell. The spell end if you leave this area. 

Creatures and objects within the dome when you cast this spell can move through it freely. All other creatures and objects cannot pass through it. Spells, magical effects, and other harmful effects can't extend through the dome or be cast through it. 

The dome has AC 15, 30 hit points, is vulnerable to force damage and slashing, piercing and bludgeoning damage from magical weapons. It is resistant to all other damage.  Any spells that damage creatures can damage the done as well. When the dome drops to 0 hit points, the spell ends. 

At higher levels. When you cast this spell using a spell slot of 4th level or higher, the some gains 15 additional hit points for each spell slot above 3rd.