Speaking of the black sea emblem, as if proud of having its achievements recognized, the rune shark which allowed that little thing to "express" some emotion, proudly raised its head to then make a turn around the cave as it released a wave of black energy which permeated the walls, ground ad roof of the cave.
The result was that the cave was now isolated from the outside, as in not only those outside of it couldn't detect the ones inside, but the same applied the other way around, well, it could also be that the interference was too strong to be skipped by Daimon who has no access to any mana.
"I guess that's a thanks for the meal", jokingly said Daimon as he saw the rune shark disappear into the black sea emblem, which then flew into his pocket.