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"Hero Altar—this is the altar that allows one to change into a hero class!"
Although the direct summoning had cost a considerable amount of energy, Donald showed no sign of regret. He stared at the Altar of Elders and muttered to himself, his emotions complicated yet excited.
He had long learned through the Book of Truth that not only could the unit buildings of the four races allow intelligent beings in this world to change classes, but the heroes of the four races could also be changed into by constructing altars. However, he had never possessed enough strength or energy to prepare for building an altar and changing classes.
Changing into a hero differed from changing into an ordinary unit class. One had to possess at least lv1 soul-level authority. Otherwise, the immense power of rules that transformed the body during the hero class change could easily shatter one's mental defenses and damage the soul. Ordinary humans basically could not reach that level. Donald's innate talent had originally been poor, and only after being strengthened by the Book of Truth and formally advancing to a Black Iron Mage had he barely met the requirement.
Any injury involving the soul was generally beyond the ability of Professionals below the Silver rank to treat. Even with a high-grade divine artifact like the Book of Truth, Donald could not heal such wounds in a short time. That would inevitably affect his future development and strength.
Later, once he had reached the Black Iron rank and met the conditions, he instead stopped being so eager to change classes.
His original plan had been to first raise his mage level to the Bronze rank and accumulate a sufficient foundation before taking on a second class. That would