The Devas ' true purpose for entering the human world is eventually revealed ; they wish to capture Calumon , and take him back to the Digital World .
They can use Calumon 's power of Digivolution .
The Devas ' true purpose for entering the human world is eventually revealed ; they wish to capture Calumon , and take him back to the Digital World , so that they can use his power of Digivolution .