Complex sentence: As Mia walks back to the cabin, she is entangled in tree branches, with the girl, a demonic form of Mia, vomit a black tar-like vine that crawls inside and possesses her.
Split into simpler sentences: As Mia walks back to the cabin, she is entangled in tree branches. The girl, a demonic form of Mia, vomits a black tar-like vine that crawls inside and possesses her.