Take for instance the first Void battleship that the Gu Yuan Clan obtained. It is one of the four current heaven grade medium warships. Despite being broken, its combat power hasn't weakened significantly.
To maximize the power of this heaven grade medium Void battleship, the Formation Method that provides the energy in the power cabin must be spirit crystals. Only spirit crystals can fully support the cruise and the shield of a battleship. But the Gu Yuan clan can't even make up for top-grade spirit stones, so how do they maximize all of its power?
Actually, it's not to say that top-grade spirit stones and superior grade spirit stones can't be converted into battleships, but because once the battleship starts running, especially during combat, energy consumption is too large - even top-grade spirit stones would struggle to maintain the continuous energy supply for battleships, let alone superior-grade spirit stones. This affected the speed and defense of the battleship.
