What to know
- Ruby Bolete comes from Rare Growth Spots in the open world, not from crafting as the main method.
- The most reliable area for it is Jingyu Valley, which becomes available through main story progress.
- After harvesting a node, it refreshes on the daily server reset, so revisits are part of the loop.
- Ruby Bolete is a promotion material used to increase Operators’ level caps (alongside other required items).
In Arknights: Endfield, unlocking the correct region is the key requirement for Ruby Bolete. Once Jingyu Valley is accessible, Ruby Bolete becomes a repeatable gatherable that fits naturally into a daily materials circuit.

Quick reference table for Ruby Bolete
| Topic | Quick details |
|---|---|
| Where it spawns | Rare Growth Spots primarily in Jingyu Valley |
| Unlock requirement | Story progression until Wuling/Jingyu Valley is open for exploration |
| Respawn behavior | Regenerates at the daily server reset after harvesting |
| Main use | Operator promotion (level-cap increases), plus other materials as required |
What Ruby Bolete nodes look like in Arknights Endfield
Ruby Bolete is tied to Rare Growth Spots, so the practical goal is to locate multiple Rare Growth Spots in Jingyu Valley and chain them into a short loop. If a spot is already harvested, it won’t pay out again until the next daily reset, so it’s more efficient to move on to the next node rather than waiting around.
A good habit is to mark any Rare Growth Spot locations while exploring. Even if a node doesn’t give Ruby Bolete every time (depending on the game’s node loot behavior), having several spots in a tight route reduces downtime and keeps the material flow steady.
How to get Ruby Bolete step by step
Step 1

Advance the main story until arrival at Wuling, and onward progression opens access toward Jingyu Valley.
Step 2

Enter Jingyu Valley and focus on locating Rare Growth Spots (these are the gathering nodes that can yield Ruby Bolete).
Step 3

Harvest every Rare Growth Spot encountered, then keep moving to the next one to build a repeatable route.
Step 4

If a node is missing or already harvested, continue the route and return after the daily server reset to gather again.
Step 5

Repeat the circuit daily until enough Ruby Bolete is stockpiled for upcoming promotions, rather than stopping exactly at the minimum needed (this helps when multiple Operators need promotion materials around the same time).
How Ruby Bolete is used and when it matters
Ruby Bolete is used as an Operator promotion material tied to raising level caps, so it tends to become relevant in bursts—right when promotion requirements start stacking up. Planning promotions around daily resets helps avoid the common bottleneck where one missing gatherable stalls an entire upgrade path.
If promotion is the goal, it’s worth pairing Ruby Bolete runs with other nearby gatherables in the same region to reduce travel time and keep progression materials balanced.
Simple farming routine that stays efficient
A consistent routine usually beats long sessions:
- Do one sweep of Jingyu Valley Rare Growth Spots.
- Save/mark the best clusters of nodes for tomorrow.
- Return after the daily reset and repeat.
- Only detour for extra exploration if it also reveals more Rare Growth Spots for future days.
This approach keeps Ruby Bolete acquisition predictable and avoids wasted time revisiting empty nodes.
Rewards for collecting Ruby Bolete
| Activity | Rewards |
|---|---|
| Harvesting a Ruby Bolete Rare Growth Spot | Ruby Bolete (promotion material used for Operator level-cap increases) |

Keeping Ruby Bolete supply steady
Ruby Bolete is best treated as a daily-reset gatherable from Rare Growth Spots in Jingyu Valley, unlocked through story progression around the Wuling phase. The most reliable way to stay ahead of promotions is to build a short, repeatable route and run it once per day.