The heart of the Stone Giant is an essential Magic Potion material for a Second-Class Wizard Apprentice to advance to a Third-Class Wizard Apprentice, and it's generally not available for purchase.
Because keeping the Stone Giant heart active is necessary for Magic Potion making, it needs to be soaked in the potion to maintain its activity for two months.
A Second-Class Wizard Apprentice must consume the potion within two months to advance to a Third-Class Wizard Apprentice.
Therefore, the heart of the Stone Giant is typically sought out by Second-Class Wizard Apprentices after reaching their limit, followed by completing a series of processes including hunting, potion making, and advancement.
Handling the heart of the Stone Giant is a case study in the course "Basic Introduction to Magic Potions", where Herag used a model for several experiments during lab classes, a process he's already familiar with.
