Arch Angel's Shield

The user launches themselves in front of a party member they see within 15ft, pushing the member back 5ft, taking the their place in getting hit by the spell or attack. If the creature's casted spell is of 3rd level or lower,  the spell fails and has no effect on you or any party members standing behind. If the spell is of 4th level or higher, make an intelligence (Religion) check: DC equaling 10 + casted spell's level. On a successful save, the you take 1/3 damage & the effects are negated. On a fail, the user must sacrifice 1/4 of total health for each party member behind the user; negating all effects for the party members behind. If the creature is CR 6 or lower, its attack does no damage and the effects are negated. If the creature is of CR 7 or higher, make an intelligence (Religion) check; DC equaling 10 + spell's level. On a successful save, the creature's attack does 1/2 damage and further effects are negated. On a failed save, the user must sacrifice 1/3 of total health for each party member behind the user. On a fail and the user has less than 10 health, the attack & effects are negated but you go unconscious and take 1 failed death save.

At Higher Levels: When you react with this spell using a spell slot of 5th level or higher, the interrupted spell has no effect if its level is less than or equal to the level of the spell slot used or the creature attacking is less than or equal to CR 9-19, depending on what slot level was used.

[ 5th lvl - CR 10 or lower ]  [ 6th lvl - CR 12 or lower ]  [ 7th lvl - CR 14 or lower ]  [ 8th lvl - CR 16 or lower ]  [ 9th lvl - CR 19 or lower ]

If the attack or spell is equal to or greater than 1/3 of the protected person(s) health, make a DC 18 constitution saving throw. On a fail,  sacrifice 1/2 of current health or take 1/2 damage, whichever is higher; Cannot go below 1 hit point.