Fercium

Tool tip
When thermium is combined with promethim in a refinery, the result is an alloy not found anywhere else in the universe, a product of the unique properties of Achoa.

Fercium is one of the best material of the game. It is required in a good amount when combining it with chromium to get rathumium.

Gathering
Fercium can't be found in the nature as you have to forge it with the Fercium Refinery by combining promethium and thermium. The Fercium Refinery can be found in the "Base Construction 11" tab.