As such, you are specifically exempted from the "construction" aspect of the Spark Mechanic. Instead, you should roleplay mixing substances when you are Sparking. Other than that, you Spark the same as any other.
Characters In Game: Marie
All Characters: Marie
The following are notes made while this was in development. They do not necessarily represent the current state of this ability.
Marie is a Spark whose particular talent is chemistry. She keeps many different ingredients in her cabin, and can mix them into a variety of interesting potions. Potion-making is basically a straight but focused Spark talent, and she must rant and expend points in the same way any Spark does.