Popi's Power!
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As Kireina was fighting against the powerful Necrotic Death Lord on his Death Titan Dragon form and overwhelming him with all sorts of insane attacks, Rimuru and her cute little Blue Slime, Popi, rushed forward towards their target, the massive Death Titan that Nova and Azure had helped her lure outside of the range of the other fighters within this battlefield. Away from any allies that could realistically give it a hand, the massive Death Titan commanded by the Necrotic Death Lord seemed to be left powerless as it looked at a small maiden made out of blue liquid, Rimuru!
But she wasn't alone, she had her loyal Maxima Summon, Popi, atop her head, leisurely sitting over it and fusing its supreme divinity with hers, all converging together into a massive sea of iridescent divine essence!