Use the laboratory equipment found in the Thaumanova Reactor Fractal to mix a blend of Destructive Substance and your Searing Concoction to form Ever-Burning Fuel.
Hint: Use power from the generators in the Bauxite Alchemicals Lab in Malchor's Leap to combine Acrid Jelly and Corrosive Paste to form a Destructive Substance.
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- Interact with the Control Panel in the northern room of the Bauxite Alchemicals Lab with both the Acrid Jelly and Corrosive Paste in your inventory.
- To gain access to the generators you must start the Bashing Bauxite Alchemicals meta chain by speaking to Senior Agent Bodd at the chopper crash on the island.
- Once you have gained access to the center of the facility there is a control panel in the northern room with the dynamic event Keep the power conduits active until power is fully restored; interacting with this will give you the option to combine the items.