Schist itself is a metamorphic rock. It's not transformed into another rock type.

However, schist can be further metamorphosed into higher-grade metamorphic rocks like:

* Gneiss: This is a higher-grade metamorphic rock that forms when schist is subjected to even more heat and pressure. Gneiss has a more distinct banding or foliation than schist.

* Migmatite: This is a rock that is a mix of igneous and metamorphic rocks. It can form when schist melts partially and then recrystallizes.

So, while schist doesn't directly transform into another specific rock, it can be a precursor to higher-grade metamorphic rocks.