William couldn't sense a soul's aura—something beyond human perception—back in the game. Hence, even with the phylactery in hand, he wasn't sure if his friend's soul was truly trapped inside.
The box was undoubtedly Nehe's phylactery—whether it was from the material of this box or the rune patterns engraved on it, William verified that their age roughly matched through appraisal spells.
More importantly, a powerful and tired soul was imprisoned in the box.
However, if he wanted to completely verify it, he probably had to wait until he found a powerful container for the soul in the phylactery before seeking confirmation himself.
"However, it's really shocking. The Forest Elves actually allowed a lich's phylactery to be placed beside the core of the World Tree? A thousand years ago, even if I threatened them with force, those druids guarding the core wouldn't have agreed to do so, right?" William said with a rare hint of meanness in his tone.