[RPG] What creatures have the regeneration ability


I am searching throughout all the different books to find the creatures with the regeneration ability. I am not particularly interested in special regeneration (Such as a hydras head regrowth or a Phoenix rebirth). I need help finding all my options for creatures with strait regeneration such as a Troll or Vampire. The higher the regeneration the better.

Alright context. I am a player in an obnoxiously homebrewed game. Our characters are a combination of 3 different creatures and we choose traits to apply to our characters from each creature. I am creating a few background characters because this is a chaos campaign and our dm throws crazy powerful stuff at us to attempt to provide us with a challenge (and occasionally goes overboard). I am trying to find creatures with the regeneration feature so that I can apply it to one of my backups. I want some options because we already have 2 vampires (One of them being my character) and I want to find one that fits the thematic of the new character. They are a combination of a Phoenix and an Air Elemental Myrmidon so far. I am trying to find a creature with regeneration that fits this theme.

Best Answer

A full list of the current creatures that are not adventure NPCs that have the Regeneration trait:

Knight of the Order - CoS (Curse of Strahd)

Belashyrra - E:RftLW (Eberron: Rising from the Last War)

Devkarin Lich - GGR (Guildmaster's Guide to Ravnica)
Jarad Vod Savo

Demogorgon - HftT (Hunt for the Thessalhydra)

Blue Slaad - MM (Monster Manual)
Death Slaad
Gray Slaad
Green Slaad
Red Slaad
Shield Guardian
Vampire Spawn
Vampire Spellcaster
Vampire Warrior

Bael - MTF (Mordenkainen's Tome of Foes)
Dire Troll
Spirit Troll
Venom Troll

Vampire Neonate - PSI (Planeshift: Innistrad)

Aquatic Troll - RoT (The Rise of Tiamat)
Ice Troll

Dragonpriest - TftYP (Tales from the Yawning Portal)

Stone Juggernaut - ToA (Tomb of Annihilation)
Yellow Musk Creeper

Frost Giant Everlasting One - VGM (Volo's Guide to Monsters)
Spawn of Kyuss
Vegepygmy Chief
Wood Woad

Bore Worm - WDMM (Waterdeep: Dungeon of the Mad Mage)
Five-Armed Troll

One way to find some of these monsters would be by using DnD Beyond and searching for "Regeneration" and filtering for monsters (example search). The problem is that this only lists the first 35 results and not all of them. Thanks so much to @Someone_Evil for pointing this out!

* The Warlord basically has the Regeneration trait but it is slightly different and called Survivor:

The warlord regains 10 hit points at the start of its turn if it has at least 1 hit point but fewer hit points than half its hit point maximum.

Credit to @Someone_Evil for finding this monster