Fiends are one of the most feared monsters in the continent and for a good reason. They attack settlements destroying live crops, attack cattle, huts, and even small houses and mutilating every person they come across and there is little that can stop them. Fiends are described as a walking mountain of muscle that can take out an entirely armored knight and horse with a single blow and they're completely immune to effects of Aard sign due to their size and sheer strength alone.

Classification: Relict Monster

Powers and Abilities: Superhuman physical characteristics, large size(Type 0+), enhanced senses(Should be comparable to a chort who are capable of smelling around from miles away), natural weaponry(Possesses sharp claws and giant antlers), regeneration(At least Low-Mid, their regeneration is described as being lightning fast and should be superior to that of Witcher's), Hypnosis and status effect inducement (Fiends are capable of using their third eye for hypnosis for an easy prey. And if the prey gets away they are temporary blinded which effects even witchers), stealth mastery(A fiend managed to sneak on two witchers before they even noticed it), resistance to ice manipulation(Completely immune to Aard's effects which can freeze several humans), fire and heat manipulation(Resisted to Igni's fire as a fiend was engulfed in flames several times and went unharmed afterwards)

Attack Potency: Building level+(Amongst the most physically powerful monster in the Witcher world, Fiends are capable of giving a tough time to or outright kill a Witcher in a fair battle and almost anything that comes their way)

Speed: Superhuman movement speed with Massively Hypersonic+combat and reaction speed (Can keep up with the likes of Geralt)

Lifting Strength: At least Class 25, likely higher (Fiends are on top as the one of the strongest monsters that ever existed. Described as a walking mountain of muscles a fiend can pin down Witchers such as Geralt and Vesemir without much effort and even Witcher's most powerful offensive sign Aard isn't even capable of moving fiends a single inch)

Striking Strength: Building level+(Managed to knock Geralt down)

Durability: Building level+(A fiend could take blows from Geralt and Vesemir. Can completely ignore an Aard blast, which is superior to witcher's physical blows)

Stamina: Incredibly high. Fiends are capable of taking massive amounts of damage without going down and their regeneration makes it harder for them to go down. Can ravage villages for a long time, and endure multiple silver sword blows from witchers which causes them great pain.

Range: Extended melee range with their claws, several meters with their third eye

Standard Equipment: Their claws and antlers. Third eye is used for hypnotism

Intelligence: Unknown

Weakness: Weak to loud noises.. their third eye can be pierced, though it will eventually regenerate.