If there is none, it can be used directly to upgrade the Secret Realm.
Dean McKenzie immediately used them on the Land of Bone.
The Land of Bone's area has doubled from its original foundation, and the amount of Skeleton Energy it can supply has increased from 3000 to 9000.
In the end, Dean's gaze fell on the last Skill Fusion Scroll.
...
Item: Skill Fusion Scroll
Description: Can fuse two skills with similar properties, both not exceeding third-turn, into a new skill.
...
Upon seeing this description, Dean was taken aback, immediately thinking of his own two skills.
Bone Shield and Bone Armor.
Both of these skills are defense skills, their natures are more than just similar.
These two skills are inherently linked.
The latter is the advanced version of the former.
Generally speaking, there is no need at all to fuse these two skills.
But it's different for Dean.
After all, Dean's Bone Shield is enhanced, and has been enhanced twice.