It is critical to an alkahest's functioning to constantly dissolve itself into new forms, to find one that can attack or escape the problem.
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A puddle of acid, a shimmering pool of light, an idea, a piece of paper with calculations written on it, a dazzling fractal, a lump of iron,
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Watch it for a while and it'll seep into your mind. Tiny doses help creativity, but any larger and it leaves only a frothing mass of ideas.