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I concentrated the overflowing elemental divinities into my own body as I wrapped them around using my larger Chaotic Supreme Divinity and the others I had, all together concentrated into a massive flow of power across my body, which I then added into Dao Essence, a special energy that flows out of any Dao by infusing divine energy into them and used it to enhance my body and soul with the power of my Daos!
And as if that wasn't enough to fight against this monster, I used the millions of minds I possess and conjured countless spells, skills, and abilities into compound attacks, divine techniques which had no name as I was coming out with them as I fought.
The Dao of Demise and Defiance were the two that were flowing the most out of them all, and they were unleashing a thunderous power from within them, which was unleashed as explosions of spacetime-dilating darkness that my reflection had to evade or take head-on for massive damage.
Check "The Protagonist's Sister Is Actually the Strongest"!