Ward of Dawn

You conjure a 10 ft radius sphere of energy around you. While within the sphere you and other creatures you designate have resistance to all damage types. No attacks or spells can enter or leave the sphere but can still be made against other creatures within. Ward of Dawn can take a total of 100 damage before it is dispelled. Unarmed attacks made within the Ward deal double damage. 

While within in the Ward you have advantage on Con saving throws made to maintain concentration on it. 

At higher levels. When you cast this spell with a 5th level spell slot, Ward can take 150 damage before it is dispelled. 

Full caster multiclass. When you cast this spell with a 6th level spell slot, Ward can take 250 damage before it is dispelled. When you cast this spell with a 7th level spell slot or higher, Ward can take 400 damage before it is dispelled.