Agathinon

Exalted Restoration. If the agathinon dies outside Mount Celestia, its body disappears, and it gains a new body instantly, reviving with all its Hit Points somewhere in Mount Celestia.

Magic Resistance. The agathinon has Advantage on saving throws against spells and other magical effects.

Chasten and Hasten. When a creature would gain Hit Points within 30 feet of the agathinon, the agathinon gains an equal amount of Temporary Hit Points, which can stack with other Temporary Hit Points from this trait. The agathinon may choose whether this aura is active or not at the beginning of its turn.

Multiattack. The agathinon makes two Divine Mace attacks.

Divine Mace. Melee Attack Roll: +8, reach 5 ft. Hit: 7 (1d6 + 4) Bludgeoning damage plus 18 (4d8) Radiant damage, and whenever the target would regain Hit Points, it only gains half of the Hit Points until the start of the agathinon's next turn.

Overwhelming Release. The agathinon channels the lifegiving energy it has accumulated, directing it at a singular target. The angel chooses a creature within 5 ft. to brand, spending the Temporary Hit Points it has accumulated. Constitution Saving Throw: DC equal to Temporary Hit Points expended. Failure: The target is Stunned until the start of its next turn. Success or Failure: The target has Disadvantage on Saving Throws to avoid being Stunned. The brand fades after 1 hour, or until it is by Greater Restoration. Only one creature may be branded by the agathinon at a time.

Spellcasting. The agathion casts one of the following spells, requiring no Material components and using Charisma as the spellcasting ability (spell save DC 17):

At Will: Sunbeam

1/Day Each: Detect Thoughts, Globe of Invulnerability

Numbing Sentinel. Trigger: A creature within 30 feet of the agathinon that is Blinded, Deafened, Poisoned, or Paralyzed is hit with an attack roll. Response: The creature loses that condition and gains Resistance to all damage until the end of the agathinon’s next turn.