Everything

A specialty of science-minded mages everywhere (most especially the Progenitors and the various factions who call themselves the Solificati), this application of Matter allows a character to transform one chemical into another one. With the proper knowledge (see below), that mage could turn salt into cyanide, water into sulfuric acid, dirt into Prozac, or oregano into pot and vice versa.

In small, simple quantities, this trick employs Matter 2 or perhaps 3. As the Matter Sphere entry in Mage 20 points out, seriously complex transmutations require Matter 4 or 5. For the most part, this is a simple process, requiring one to three successes unless there are complicated formulations required on the molecular level.