This piece of the Scourgestone is dropped by either Gall o' the Spear-din or Hekkr Waverunner, they are named t4 fighters of the Black Hand Pirate faction.

• Black Hand Pirate faction is not to be confused with Black Hand faction, those are the pirates in the desert around the Black Galleon! Black Hand Pirates are located in the jungle.
• Gall o' the Spear-din or Hekkr Waverunner share a 100% spawn in the Captain's Quarter atop Buccaneer Bay, however they are just regular t4 fighters and thus can appear on every fighter spawn of the Black Hand Pirate faction with a chance of ~2%.
• Noteable camps for Any% run: Deckswab's Retreat and Descent of Dagon, both with 5 fighter spawns. These can easily be incorporated into your route and save a run to Buccaneer Bay, if you dare to face even more RNG.