Charles had already made up his mind.
He remembered that this particular item first appeared in an abandoned ruin. The commotion it caused at the time was minimal, and many people didn't take the Relic seriously. This was one of the few Relics he currently had a chance to obtain, and he was determined to give it a try.
However, before that, Charles needed to settle things in the Serene Forest to ensure no issues arose while he ventured into the Realm of Chaos.
[Ding! Congratulations to the host for acquiring the first subordinate force!]
[System Reward: Battlefield Armor Bug Blueprint (Gold-tier unit), Spore Defense Tower (Defense facility)]
After Ethan's death, the authority he held over the Forest of Elves reverted back to Overlord Eve.
The vassal contract was automatically signed, and a system reward prompt appeared before Charles.
[Battlefield Armor Bug Blueprint: Refined Celestial Steel + Mutated Crystal Core + Mutated Beetle Eye]