When leaving the cave, the group didn't bring much along.
The materials from the Soul devouring Spider aren't particularly valuable. Their most essential material is the Strong Dissolving Venom, which can be used in Alchemy to produce certain specific potions.
In terms of Equipment Creation, the venom is mainly used to process some difficult-to-handle materials.
The spider's materials themselves can only be stacked to make armor with less-than-ideal performance.
However, they can still be sold for some money, so Li Ang put these materials in a rundown small house, covering the more valuable Whiteflower Wasp material. The spider wasp's egg sac was placed in his backpack.
The hidden location on the system map—Engineer's Basement—isn't far. Finding the special merchant and high-risk places was merely along the way.
Li Ang estimated the time; a round trip shouldn't encounter anyone coming over.
