Complex sentence: This Beast is later called "The False Prophet" (Rev.16:13; Rev.19:20; Rev.20:10) and together with the Dragon (Satan) and the First Beast (the Antichrist) forms the unholy trinity.
Split into simpler sentences: This Beast is later called "The False Prophet" (Rev.16:13; Rev.19:20; Rev.20:10). In Christian eschatology the Beast together with the Dragon (Satan) and the First Beast (the Antichrist) forms the unholy trinity.