Barrade of Faith

This spell creates a dome barrier, with purple auras emitting. This barrier is only visible one way, chose which way , the side facing you, or the side opposing you. Every time when this is attacked with at least 3 physical or  non magical weapon attacks, it releases a wave towards the direction of where it has been hit. The waves radius is 30 feet, dealing 2d6 force damage to anyone in this range. If the Barrier is attacked over 3 times, it releases another wave, of 30 feet, and anyone within 30 feet suffers 1 point of exhaustion. When attacked with +1, +2, or +3 weapons, the caster rolls a d4. If the caster rolls a 4 the attack  misses. If not, then the caster makes a DC 8 Dexterity saving throw or the spell fails. If it is attacked with a spell of 5th level or higher, it instantly fails. Also if dispel magic or similar spells are casted upon it, it instantly is dispelled.