The Grand Fortress is a Tier VII Ship and requires a level 41 Shipyard to build.
The Grand Fortress has 120 Million Base HP, 1 Base Speed, and 2,560,000 Attack. It costs 400,000 Credits, 400,000 Ore, and 200,000 Energy to build.
It has a base build timer of ?? hours and ?? minutes. (??) To use a grand fortress, it requires a hero with at least 700 command. The Mobile Fortress adds 40M to your army, and only one Mobile or Grand Fortress can be active per player at a time.
To be reinforced by an GF, your current total army must be at 200m or above.
It can hold 4 Weapon slots and 4 Device slots.