Ruby Bolete is a rare material item in Arknights: Endfield. This article will guide you on where to find the Ruby Bolete in Arknights Endfield.
Arknights Endfield Ruby Bolete location and how to use
Ruby Bolete are special mushroom that you can cultivate or find on the map, and they are used to upgrade character potential. There are 2 Ruby/Red Bolete growth spots in Jingyu Valley, Wuling.

After you collect Ruby Bolete, it will grow back after the daily reset, normally after 24 hours. So make sure to check it daily. As your Exploration Level goes up, you can find more Ruby Bolete at these spots.

Cultivating Ruby Bolete
You can also obtain Ruby Bolete by growing it in the Growth Chamber on the OMV Dijiang. To do this, you need Ruby Bolete Mycelia, which is used as the growing material. However, this option is locked at the start of the game and only becomes available after upgrading your Cabin to Level 3.
How to Use Ruby Bolete
Ruby Bolete is an important material used to promote your Operators. When you promote an Operator, their level cap increases, allowing them to grow stronger and reach higher levels.