Nylocas Prinkipas are part of the wave prior to the Nylocas Vasilias encounter found only in the Theatre of Blood/Hard Mode. Three of them spawn throughout the encounter alongside Nylocas Hagios, Nylocas Ischyros and Nylocas Toxobolos as they attempt to destroy the pillars. However, they remain in the middle of the room attacking the players instead of targeting the pillars. It changes its combat style by changing its carapace, which also indicates its weakness: blue for magic, green for ranged and white for melee. Attacking it with the wrong combat style will cause it to reflect the hit back towards the player as well as healing from the hit. It will change every 10 ticks (6 seconds), and it will always change to one of the other two styles (meaning it will not stay on one style twice in a row).
- The word "Nylocas" is very similar to the Hungarian word "Nyolcas", meaning "eight", referencing the eight legs of this arachnid-like creature.
- The latter part of the name of the Nylocas Prinkipas likely derives from the Greek term "πρίγκιπας" ("prínkipas"), meaning "prince", referencing the fact that the creature is stronger than the other Nylocas, but weaker than the "Vasilias", whose name is derived from the Greek word for "king".