Complex sentence: Beyond this lies the Cymek desert, which is populated by garuda and cactacae, and beyond the Cymek desert is found The Witchocracy, which controls the Firewater Straits.
Split into simpler sentences: Beyond this lies the Cymek desert, which is populated by garuda and cactacae. Somewhere beyond the Cymek desert is The Witchocracy, which controls the Firewater Straits.