It would definitely be a mutation of metal, poison, water and maybe acid, crystal, stone, and magma
One of slightly slower magics, and average damage, but very large size (because it feels like it’d be kinda slow but huge)
Poisons enemies on hit because that is what mercury does
Leaves behind puddles that do high damage on contact, maybe also clouds but idk
Thoughts? This isn’t, not will ever be, a suggestion, it’s more of a thought I had randomly