The little helper angel, the lantern archon, is one of my favorite and it really disappointed me that it was not in the MM. This is a perfect creature that a cleric should be able to conjure up for help. Heck, you could even say this is the spirit that takes on an animalistic form from the find familiar spell when finding a celestial.
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Lantern Archon
Tiny celestial, lawful good
Armor Class 14
Hit Points 76 (17d4 + 34)
Speed fly 30 ft.
STR 3 (–4) DEX 19 (+4) CON 14 (+2)
INT 12 (+1) WIS 18 (+4) CHA 15 (+2)
Saving Throws Wis +6
Damage Resistance radiant
Condition Immunities charmed, exhaustion, frightened, petrification
Senses darkvision 120 ft., passive Perception 14
Languages all
Challenge 2 (450 XP)
Innate Spellcasting. The lantern archon’s spellcasting ability is Charisma (spell save DC 12). The lantern archon can innate cast the following spells, requiring only verbal components:
At will: aid, detect evil and good
Magic Resistance. The lantern archon has advantage on saving throws against spells and other magical effects.
Actions
Multiattack. The lantern archon makes two light rays attacks.
Light Rays. Ranged Weapon Attack: +6 to hit, range 60 ft./360 ft., one creature. Hit: 6 (1d4 + 4) radiant damage.
Healing Touch (1/Day). The lantern archon touches another creature. The target magically regains 9 (2d6 + 2) hit points.