Nylocas Athanatos spawn during the second phase of the Verzik Vitur during the Theatre of Blood. These nylocas do not target players but instead attend to Lady Verzik, healing her much like the Nylocas Matomenos.
Despite never attacking the player directly, casting Monster Examine will reveal that it has a stab attack style and a max hit of 11.
- The word "Nylocas" is very similar to the hungarian word "Nyolcas", which translates to the number "eight" relating to the eight legs of this arachnid-like creature.
- The latter part of the name of the Nylocas Athanatos likely derives from the Greek term "ἀθάνατος"(transliterated, "athánatos"), meaning "undying" or "immortal". Thus, the Nylocas Athanatos may also be understood to be an Immortal Nylocas - a name likely intended to lend credence to its lore.