Serpent-class heavy destroyer (EXverse)

The first next-generation class of the UNSC Navy, the Serpent-class escort destroyer is a fast, small vessel capable of independent patrols and escort of other ships, no matter size, developed to replace pre and early-Insurrection destroyers, other than serving as a basis for future ships.
Built during the final years of the Great War, it was a challenge for the Change Aerospace Corporation and humanity as a whole as they tried to conceived a cutting-edge vessel using reverse-engineered technologies. While the experiment was after all successful, some issues were encountered, such that energy shields nor newer weapon systems were implemented. Despite this, the hopeless Navy decided to awarded Change Corporation more than three hundred vessels.
During the war Serpents performed good, but without shining. So, after the war, with advanced technologies refined and ready to be used, Change conceived a new block; however, the airframe was slightly modified, so, jointly with Naval Command, all active Serpents were scrapped, and materials recovered were reused on the new block of destroyers. This time shielding was implemented, however widespread use came after 2556 due to resources shortage, alongside less conventional weapons.