This Slime Will Not Give Up!

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Rimuru will not give up! She unleashed the power of her various Armor Skills which she had been building and upgrading all this time, merging them together with the latest Mech Design created by Kireina's Divine Realm engineers and several Totems to boot, the amazing new transformation covered Rimuru's small body with a 200-hundred-meter-big mega mecha! This mecha was stylized into a beautiful metallic golden rainbow luster and it had a faint resemblance to Gundam designs, but stylized into a feminine appearance, with slender limbs and curves on its figure!

The rainbow mech flew towards the gigantic phoenix which was being attacked by Popi's new combined attack, as he shone like a rainbow and slimy sun atop the skies, flashing rainbow stars and firing them towards the embodiment of death and darkness made into a phoenix!