You create a barrier of holy light. The barrier has as many hit points as you do. The barrier can be dispelled or shattered by attacks. All damage is halved against the barrier magical and melee. Damage from bolts and arrows are nullified.
You can make the barrier appear as far as 60 feet away so long as you can see that far. You can also make it any basic shape you choose. You cannot move more than 60 feet away from the barrier or it automatically drops. The barrier cannot move, so it cannot act as armor. If creating a wall it must be no longer than 40ft, and 60ft high. If creating a sphere, cube or cylinder it must be no larger than 25ft.
hostile creatures cannot pass through the barrier but non hostile creatures can, these are decided by the caster.
If the barrier begins to crack or shatter and have a reaction. You can restore the barrier back to full by casting the spell again if you have a reaction. If you are out of reactions you may burn a channel divinity to restore the barrier but are stunned until the end of your next turn. If the barrier breakes, any left over damage carries over.
At each level casted above 1st add 2 HP to the barriers health maximum and increase all distances and ranges by 10ft for each level beyond first.