Transmute Water to Mercury

You point at a body of water within range and cause it to transform into liquid mercury. The volume of water affected by this spell is equal to 5 cubic feet per level of the spell slot used to cast it. The mercury has the same temperature and movement as the water it replaced. Any creature that is in contact with the mercury when the spell is cast must make a Constitution saving throw or take 4d8 poison damage and become poisoned for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.

The mercury created by this spell is permanent and can be used for crafting or other purposes. However, it is highly toxic and may have harmful effects on the environment and living beings. The DM may decide the consequences of using this spell in different situations.