Heavy Ore is found inside the cave on Lou's Island and requires Swirler 2.0 to harvest. Multiple current guides agree on that route. One hands-on guide adds that the limited nodes return after several in-game days, so treat Heavy Ore as a timed circuit rather than an endlessly farmable pile.
Location and tool requirement
Fly back to Lou's Island, enter the cave, and use Swirler 2.0 on the Heavy Ore deposits. The version number is the important gate. If you arrive with the starting Swirler, the trip will not solve the problem even though you are standing in the right place. Finish the Swirler 2.0 upgrade first, then make Heavy Ore part of your regular Lou's Island circuit.
The route is supported by a hands-on tips article and two independent crafting or upgrade guides. All three place Heavy Ore on Lou's Island and connect it with the upgraded Swirler. That agreement is why the Resource Finder labels this entry cross-checked rather than treating it as a lone forum hint.
Build Swirler 2.0 before the cave trip
The early upgrade recipe is eight Magnetic Pulse Bolts plus 4,250 Shellings. Each bolt takes two Refined Metal, and each Refined Metal takes six Scrap in the launch-build tables. Work backward and the practical gathering list becomes 96 Scrap plus 4,250 Shellings. Our Upgrade Planner performs that expansion and lets you subtract what is already in storage.
Do not wait until the upgrade bench is open to discover that refinement is the bottleneck. Put the Refined Metal queue in motion, then leave the menu and do another task. A current video guide notes that crafting continues after you close the menu. That makes the Swirler upgrade less of a standing-at-the-machine exercise and more of a route-planning exercise.
Treat Heavy Ore as a recurring stop
One hands-on guide describes Heavy Ore as limited to the Lou's Island cave and says it takes several in-game days to return. We have not found an official numeric timer, so the useful behavior is to think in loops rather than count exact hours. Visit the cave, clear the available nodes, continue quests or another island route, and check again after a few in-game days.
The same guide notes that buying Heavy Ore is expensive. That gives the cave route lasting value even after the first quest. Whenever you return to Lou's Island for Woodthorn, Driftwood, crops, or a conversation, include a quick cave check. A small repeat habit is more reliable than discovering you need a large batch only after starting a Power Source chain.
How much room to leave
Inventory pressure is a recurring player complaint around Power Sources. One Steam discussion describes the friction of moving among the plane, machines, and several islands while repeatedly clearing slots. The simplest protection is to unload before the cave run. Stand close to the plane, open inventory, and move low-priority items into aircraft storage.
Do not fill every free slot on the way to the cave. Lou's Island offers several other basic resources, and the whole point of a planned circuit is to avoid flying home for one forgotten ingredient. If your Zipper has expanded through quests or hidden chests, reserve that extra capacity for the resource chain you are actively working on rather than carrying a museum of one-off items.
Where Heavy Ore goes next
The launch-build crafting table uses Heavy Ore to produce Pulsanite alongside Pulsitium. Pulsanite then feeds the Power Source recipe. A worked three-Power-Source example reports 24 Heavy Ore, which is eight per Power Source in that chain. Because the full formula is presently supported by one complete public recipe table, we present it as an attributed release-week reference rather than a permanent game rule.
Heavy Ore also appears in gadget progression, which is why gathering only the quest minimum tends to create a second shortage. Check the live recipe card and your Lexicom before deciding on a target quantity. If the game shows a different total than a web guide, the current in-game UI wins.
A compact farming loop
Start at the plane with empty slots. Enter the Lou's Island cave and harvest every Heavy Ore node you can reach with Swirler 2.0. On the return leg, collect Woodthorn or Driftwood needed for your next Glider or refinement job. Deposit the haul in plane storage, start the next refining batch, then spend the respawn interval on Norleaf Circuitry or Gleam Reef Pulsitium.
The loop is meant to reduce dead flights, not shave seconds off a speedrun. Current player impressions say the flying and gathering are enjoyable when the objective is clear. A short written manifest keeps that rhythm from collapsing into repeated inventory cleanup.
Quick checks
Frequently asked questions
Where is Heavy Ore?
Inside the cave on Lou's Island.
Which gadget level is required?
Current guides agree that you need Swirler 2.0 or better.
Does Heavy Ore respawn?
A hands-on guide reports that it returns after several in-game days; no official exact timer was found.
Sources checked
- Lou's Lagoon — Tips and TricksTheXboxHub · checked 2026-08-29
- Lou's Lagoon Crafting Guide9Puz · checked 2026-08-29
- Lou's Lagoon Gadget UpgradesRedfreshet · checked 2026-08-29
- Storage spaceSteam Community · checked 2026-08-29