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The two Divine Fairies stopped the Insectoid King, their power converging together. Alone they were only as strong as a Peak Great God, but when together, channeling their power as one, their might could even reach the realm of Low-Ranking Supreme Goddesses.
And if their power was further boosted by their new Ego Dresses, Accessories, and Weapons, their might was more than enough to defeat a mere Insectoid King, especially after Kireina allowed both half-spirit girls to absorb the Spirit Energy of this world like Brontes did, and even ended up acquiring {Spirit Hearts} of their own!
"{Divine Frost and Blaze Spirit Resonance Magic}: {Muspelheim And Niflheim's Domain}!"
FLAAAASH!
The flames and frost converged together unnaturally, even as both elements were complete opposites, they danced around, generating not only a barrier to protect Uru, but also two enormous arms.
Check "The Protagonist's Sister Is Actually the Strongest"!