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While all of this was happening, Kireina had left behind a Doppelganger body in the sea. As she was about to go help everyone else, she ended finding Yggdrantia and Faylen, who due to their exhaustion, were resting in the seas, and ended being surrounded by Miasmic Aberrations.
"Ugh, we can't even take a break after defeating the Titan!" Faylen cried, using her magic to fight the aberrations barely, and relying heavily on her Ego Equipment and her Ego Magic Bow, given to her by Kireina.
"We have to survive no matter what! Don't worry Faylen, in a few more minutes I should be able to recharge more Energy to- Ah!" Yggdrantia was trying to stay positive, but quickly noticed her roots being infected by Miasma.
"GRUOOHHH!"
And to make things worse, several of the Aberrations started fusing together, forming Giant Aberrations, attempting to infect Yggdrantia with their Miasma and inhibit her regeneration of energies.
Check "The Protagonist's Sister Is Actually the Strongest"!