Pig Destroyer have premiered a new video for their new song “The Calvary.” This track is from their new EP “The Octagonal Stairway,” which will be released on August 28. “The Octagonal Stairway” Track Listing: 01. “The Octagonal Stairway” 02. “The Cavalry” 03. “Cameraman” 04. “News Channel 6” 05. “Head Cage” 06. “Sound Walker” Pre-orders…