The Master of Teleporting (in-game name Siirtäjämestari).
Its attacks cause the target to teleport around, as if covered by Teleportium.
These appear in the two Fungal Cavern biomes, the first being to the left of the Coal Mines. They are VERY dangerous as they may teleport the player into unexplored rooms filled with enemies, notably the Tentaclers and Robo-Cops. Exercise caution and focus on avoiding their shots, as with Blinding Mages.