The group continued deeper after the seven Immortal Kings successfully killed the King-rank Abyssal Sea Monsters.
It wasn't long before they encountered three more.
Almond and Lily took one each, improving themselves while one Immortal King of the party clashed with the third.
Almond and Lily showed modified versions of their Regalon Spirit Armaments, with lower than usual boost, deciding to show it as them activating their bloodline power.
Since they were fighting against Immortal King Abyss Sea Monsters and didn't want to look fake, they purposefully restricted their power level to give themselves a challenge.
Limiting themselves could provide them with insights in new ways to grasp more power. And since they were in exploration-phase to improve themselves, doing this was perfect.
They couldn't one-shot Immortal King monsters with restrictions, but their combat ability and style still impressed Lyna and others.