Damar's attack ship was a Jem'Hadar attack ship used by Damar and other members of the Cardassian Rebellion to travel to Cardassia Prime in late 2375.
After Damar, Kira Nerys and Elim Garak left the ship to meet with Gul Revok and Legate Goris, Seskal was left in command. Unfortunately, the Dominion was waiting for Damar and the attack ship was later destroyed by a Breen warship. (DS9: "The Dogs of War")
Weyoun later confidently told the Female Changeling that Damar had died aboard the attack ship. (DS9: "What You Leave Behind")