Mercury

You can find it in chests around Pywel on rare occasions, but the Research for it lies in Delesyia. To begin the required Research in Delesyia, you’ll need to have completed Chapter XI.

Unlock Mercury via Research

Once done, you’ll need to complete the Basic Science Research there, followed by starting the Mercury Research at the Institute of Delesyia.

Once this Research hits the halfway mark, the Research will pause. Upon taking on the short quest to investigate why, the researcher you speak to south of Delesyia will inform you he needs more Mercury to study, and asks you to collect some.

He’ll hand you an Electromagnetic Frostspitter, which you’ll need to equip. Then you’ll need to locate a pool of liquid Mercury. The one shown here is actually found near Hexe Sanctuary, though it can also be found near Silver Wolf Mountain in Pailune.

How to farm Mercury

Once you find a pool of Liquid Mercury, simply draw the Electromagnetic Frostspitter as you would any ranged weapon, and use it to freeze the Mercury. Try to freeze as much of it as you can before it begins to shatter.

Once the ice begins to shatter, the pool will disappear, leaving behind chunks of Mercury you can collect for each chunk of ice.

You can also buy Mercury from the Camp Quartermaster at Greymane Camp, though it’s pricey. Freezing pools yourself is far cheaper once you have the Electromagnetic Frostspitter.