The Titanic Scalder is a Stage 2 harpoon gun added to Fisch with The Deep update. You cannot buy it from a merchant. Instead, you gather three materials across The Deep and forge the weapon for free at a dedicated harpoon anvil hidden inside the Ancient Archives.
Quick answer: Reach level 200, then bring 1 Thermal Harpoon, 1 Heat-Proof Metal, and 25 Salvage Scrap to the harpoon crafting anvil in the Ancient Archives (behind the Ancient Isles waterfall) and select the Titanic Scalder recipe.
Titanic Scalder crafting requirements
The recipe costs 0 C$, so the entire effort is spent collecting materials and reaching the crafting station. You also need to be level 200 before the anvil will let you build it.
| Detail | Value |
|---|---|
| Location | Ancient Archives (Ancient Isles) |
| Source | Crafting at the harpoon anvil |
| Level requirement | 200 |
| Materials | 1 Thermal Harpoon, 1 Heat-Proof Metal, 25 Salvage Scrap |
| Craft cost | 0 C$ |
Get the Thermal Harpoon from Vesper of the Deep
The Thermal Harpoon is a one-time quest reward. Head to the crater zone at the back of The Deep and find the diver NPC named Vesper of the Deep near the Lower Deep beacon.
Accept the quest called The Deep: Thermal Adaptations. It asks you to catch 15 fish in the Lower Deep. Turn the quest in once the count is met to receive the Thermal Harpoon.
Get Heat-Proof Metal from Hunter Dan’s questline
Heat-Proof Metal comes from finishing all four quests given by Hunter Dan. You can find him at his campsite near the first tower (Tower 1) in Sector 1P-1. Work through his quests in order.
Turn in the last quest to receive the Heat-Proof Metal. A “Warping…” overlay confirms the reward has been added to your inventory.
Farm 25 Salvage Scrap in The Deep
Salvage Scrap is the bulk material, and you need 25 of it. It drops from salvage items found around The Deep, such as the Divin Helmer and Broken Flashlight. You can pull salvage off the ground with a harpoon or reel it in while fishing.
The fastest route is AFK fishing with Trash Bait or a rod like the Toxinburst near salvage-heavy spots including Gloomy Crevice, Tower 3, the Outer Deep, and the area around Dr. Vane. Keep fishing until your Salvage Scrap count reaches at least 25.
Reach the Ancient Archives and craft the Titanic Scalder
With all three materials in your bag, travel to the crafting cavern. The key detail is that the Titanic Scalder uses a separate harpoon anvil, not the fishing rod stations, so the recipe only appears when you open the correct table.
The craft succeeds when the Titanic Scalder appears in your inventory. You can then equip it like any other rod. If the recipe does not show up, you are likely at a rod station instead of the harpoon anvil, missing one of the three materials, or below level 200.
Titanic Scalder stats and ability
The Titanic Scalder is a high-resilience harpoon gun with strong velocity. Its stat spread favors staying reliable through the pull rather than raw power.
| Stat | Value |
|---|---|
| Power | 9 |
| Range | 128 studs |
| Reload | 2s |
| Velocity | 32/ps |
| Resilience | 40% |
| Accuracy | 20% |
| Max Kg | 100,000 kg |
Its special ability is Forges of Blazing Heat. Every successful pull raises both the heat bar and mutation chance by 5%, while a missed pull drops both by the same amount. When the heat bar is full, catches gain a 100% chance for Scalded (9×), and the ability also increases how often pull buttons spawn as the heat bar climbs.
For enchantments, pairing Ballistic with Reinforced extends the pull button lifetime and limits its movement, which suits the weapon’s pull-heavy heat mechanic. Because its money-making potential is modest, most players treat the Titanic Scalder as a niche pickup rather than a grinding rod. If you want a follow-up target, the Relic Piercer uses the same Ancient Archives harpoon crafting, while the Trident Striker sends you toward the Desolate Deep.
