1. Magma: If a metamorphic rock is subjected to enough heat and pressure, it can melt and become magma. This process is called anatexis. The magma can then cool and solidify to form igneous rock.

2. Sedimentary rock: If a metamorphic rock is exposed to weathering and erosion, it can break down into smaller pieces. These pieces can then be transported and deposited, eventually becoming sedimentary rock.

It's important to note that these are not the only possibilities. Metamorphic rock can also remain metamorphic if it is subjected to further changes in temperature and pressure. However, the two most common outcomes are its transformation into magma or sedimentary rock.