You are a monarch, like your parents before you, a ruler of a small pleasant kingdom of rivers and evergreens. Unlike your parents, however, you have hopes and dreams! You want a bigger and more pleasant kingdom, with more rivers and a wider variety of trees. You want a Dominion! You will bring civilization to these people, uniting them under your banner.
There are strange things going on in your basement laboratories. They keep calling up for more barrels of quicksilver, or bits of your hair. Well it's all in the name of progress. They're looking for a way to turn lead into gold, or at least into something better than lead. That lead had just been too good of a bargain to pass up; you didn't think, where will I put all this lead, what am I going to do with this lead anyway. Well that will all be sorted out.
They're also looking for a universal solvent. If they manage that one, you will take whatever they use to hold it in and build a castle out of it. A castle that can't be dissolved! Now that's progress.
Dominion Alchemy Expansion is an expansion for Dominion, and must be played with either Dominion or Dominion Intrigue (or both), and cannot be played on its own.