Fang Mu always held high expectations for the Mechanism Fortress.
Especially after the Mechanism Fortress was upgraded to Legendary Quality and gained the exclusive trait [Rock Gold Detection].
[Rock Gold Detection] significantly raised the upper limits of the Mechanism Fortress's capabilities, transforming it from merely a mobile palace with survival abilities into something far greater.
The Mechanism Fortress acquired the skill [Infinite Extension] upon entering the Sequential rank. This ability didn't further enhance the exclusive trait [Rock Gold Detection], but instead improved the Fortress's storage capacity.
Such an ability might not initially seem all that important.
But nothing is absolute; quantity changes can often lead to qualitative transformations.
Through [Infinite Extension], the Mechanism Fortress absorbed spatial attribute Metal Spiritual Materials to infinitely expand its mechanical gears, thereby increasing its internal space.