During a stand alone game Turn 77, I fulfilled the requirement for Malevolent Aggression V. At this time (and for the next 3 turns) the Overlord class vessel was not granted to my worlds. Any help on where to look/...
I just unlocked this trait and got the ship appearing to the right of my worlds. Note that "overlord" is a general ship type and the ship name varies between factions.
Do you have a save game with the missing ships?
