If there were one material that would be considered one of the hardest to farm in The First Descendant, it would be the Mixed Energy Residue. They only drop from Encrypted Vaults. These Encrypted Vaults are not only hard to find, but there are two requirements before you can open them. This is the only way you can get Mixed Energy Residue in The First Descendant, and here’s the best way to farm them.
Where to Get Mixed Energy Residue in The First Descendant
The Mixed Energy Residue only drops from Encrypted Vaults in the Agna Desert region. These drop from both normal and hard mode difficulties. However, before you start looking for them, you need to farm the materials that are used to open these Encrypted Vaults. Here’s a quick cheat sheet: