Aeon possessed a [Revival Necklace] that granted him additional lives within the Celestial World Tree. However, when venturing into battle play worlds or foreign realms, the necklace's protective magic proved ineffective.
In contrast, the [Substitute Crystals] could grant him three additional lives in these foreign worlds. Within the battle play worlds, Aeon could actively awaken the Class Skill and create Substitute Crystals, thereby securing extra lives.
'Let's create the Substitute Crystals now,' Aeon thought as he placed the remaining 660 Class Crystals into his storage ring.
He resolved to create three Substitute Crystals before advancing to the next phase of his plan. Even in the absence of immediate danger, Aeon believed it was prudent to prepare these life-saving measures.
[Crystal Substitution]
Aeon selected three High-level Epic Bone Essence Crystals and infused them with his Life Power while activating his Second Class Skill.