The Undefined Magnetite Core is one of those Fisch items that sounds like a rare fishing drop but is actually just a shop purchase. If you have been casting your rod in the Drylands hoping it will eventually appear in your inventory, stop now. This is a quest item you buy, full stop, and the whole process takes about two minutes once you know where to look.
What is the Undefined Magnetite Core?
The Undefined Magnetite Core is a progression item tied exclusively to the Drylands Shopping Errand quest in Roblox. It does not drop from fish, enemies, or any other source. You walk up to a merchant, pay 15,000 coins, and it lands in your inventory. That is the entire acquisition loop.
Think of it like a crafting material you pick up from a shop before a story beat rather than something you grind for. Once you turn it in, the questline advances and you never need to farm it again. It is a one-time purchase, not a repeat resource.
Shopping Errand quest objective
How to get the Undefined Magnetite Core
The full process breaks down into four clean steps. None of them are complicated, but skipping straight to the merchant without the right coin balance is the most common way players stall out.
Step 1: Start the Shopping Errand quest
Pick up the Drylands Shopping Errand quest from its quest giver NPC. The objective will immediately flag the Undefined Magnetite Core as a required item. Read the objective text carefully here because the exact item name matters. Grabbing a different Magnetite-style item will not satisfy the quest condition.
Step 2: Find the local merchant
Here is the part that trips most players up. The merchant selling the core is not somewhere across the desert. They are positioned very close to the quest giver NPC, so you barely have to move. If you are scouring the wider Drylands looking for a shop, you have already gone too far.
Step 3: Buy the Undefined Magnetite Core
Approach the merchant and purchase the Undefined Magnetite Core for 15,000 coins. Confirm it appears in your inventory before leaving the shop. That price is not steep by mid-game Fisch standards, but you do need the full amount available before you interact with the seller.
Step 4: Return to the quest giver
With the core in your bag, head straight back to the Shopping Errand quest giver and hand it over. There is no detour required. The Drylands questline advances immediately, and you are done with this item permanently.
Do you need the Undefined Magnetite Core more than once?
No. This is a single-use quest item. Buy it, turn it in, and it exits your progression loop entirely. You will not need to farm coins for a second purchase or revisit this merchant for the same item later. Once the Shopping Errand quest registers the handoff, the core has served its only purpose.
This matters because some players hold off on buying it, thinking they might need extras for crafting or upgrades down the line. Save yourself the hesitation: buy it when the quest asks, turn it in immediately, and redirect your coin-farming energy toward gear that actually scales.
Quest giver and merchant location
How much does the Undefined Magnetite Core cost?
The flat price is 15,000 coins. There are no discounts, no alternative currencies, and no way to reduce that number. For context, 15,000 coins is on the lower end of meaningful purchases in Fisch, so if you are deep enough into the game to be running Drylands quests, you should be able to cover it without much grinding.
If your wallet is light, a few solid fishing sessions in productive spots will close the gap quickly. Check our Roblox Fisch beginners guide for money-making strategies that apply even at mid-game stages.
After you complete Shopping Errand
Finishing this quest opens up the next phase of the Drylands questline. From here, the game's mid-game goals become more accessible, and you can start chasing rods, companions, and harder content without this quest blocking your path.
If you want to keep building out your Fisch progression, the Boreal Pines update guide covers some of the more involved questlines and bestiary completions worth tackling next. For players still working through earlier content, our full Roblox guides collection has everything from rod unlocks to companion locations organized in one place.