History of Speleologist

Overview

Speleologist is a Legendary Solar Machine Gun from Episode: Echoes (a Solar LMG). Like other Echoes weapons it carries the Radiolaria Transposer origin trait tied to Radiolaria fluid. Community roll guidance (TheGamer-style PvE picks): Deconstruct with Incandescent or Killing Tally.

Acquisition

Destinypedia lists Speleologist as an Act 3 weapon. Its flavor text quotes Eido. Heavy ammo weapon. Echoes weapons are Legendary and were not covered by sunsetting. None of the sources I opened confirmed whether a craftable pattern exists or an Adept variant, so check in-game. See also Weapon crafting and Episode: Echoes.