From Lexicanum

Legatus Stygies is an Emperor Class Battleship which was seen in action during the Age of Apostasy where it survived a ramming attack during the Battle of Callavell.² It was also seen during the Gothic War¹; escaped destruction during the Purgation of Ulthranx and destroyed the Chaos battleship Black Pain.²

Sources

• ¹:Battlefleet Gothic Rulebook p106
• ²:Warp Storm