A Black Key
After he finished the daily quest, Feltia [2] did not immediately return to Ursula's black castle but instead went to the Endless Death, especially since he still had a quest to find the missing relic.
Sometime ago, Ashreth told Feltia [2] that there were two missing relics in the Amaris Twins' sub-realm. One is inside the black castle, which he believes is Ursula's orb, but it does not complete the quest. That's why he decided to go to the Endless Death, especially since she told him that the second relic was there, and he believed that it was in Tharnon's hands.
After he met Tharnon once, Feltia [2] no longer felt afraid of the Endless Death, and he immediately flew down into the abyss. Even so, he didn't use his light element, especially since the ancient demon beast hated it so much, and he used his fire element to light up the place.
"Hmm?" Tharnon immediately looked up as soon as he saw that. "Why did you come to my place, human?"