This kind of calling wasn't unfamiliar to Eve.
After obtaining a fragment of the Life Scepter from Nidhogg and restoring it, Eve had a similar experience.
That time, she sensed the call of the remaining third of the fragments, which originated from the Platinum Dragon King Reinhardt, who visited her a few days ago.
As for this time...
"It's the final fragment of the Life Scepter!"
Eve felt a stir in her heart.
Previously, she hadn't detected the third fragment, probably because this part was too small and its fluctuations were masked by the third of the fragment with Reinhardt.
But now, with Eve having successfully restored most of the Life Scepter and with only a small piece missing, there were no other fluctuations to obscure this final fragment.
Furthermore, the more restored the Life Scepter became, the stronger the ability to sense its fragments grew. In this situation, detecting the call of the last fragment was only natural.