Just as with the dungeon, the fortress had a Manager Mode. Taehyun immediately opened the shop and began browsing for essential upgrades. [Watchtower (Stage 1)] [Description: A tall structure built to observe the enemy or surrounding movements.] [Cost: 2,000 Zen] [Barricade (Stage 1)] [Description: A means of marking a boundary and enclosing a certain space.] [Cost: 3,000 Zen] [Mounted Crossbow (Stage 1)] [Description: An interception weapon that can be installed on castle walls or watchtowers.] [Cost: 5,000 Zen] This should be a good start. The fortress was too valuable to lose. Despite the steep cost, he purchased all three without hesitation.