The warp disk is a Nerazim weapon developed after the End War. It operates on a similar principle to a rotating warp blade, but consists of a different energy. The weapon is designed to be thrown then controlled psionically.
The warp disc is around the size of a drink coaster, and is made of a dark metal. When activated, it produces a meter long disc of warp energy. It rotates at a rapid pace when thrown, and can cleave through most zerg creatures.