You hadn’t harmed a single Monster in the Underground. You had been a Pacifist. Wearing the Heart Locket and wielding the Worn Dagger, you had spared Asgore, after fighting him, but… Flowey finished him off.
“Howdy! It’s me, Flowey! I only need your SOUL before I become GOD!” Omega Flowey exclaimed to you, staring at you. “HAHAHAHAHA!! OOHHHHH!! HAHAHAHAAHAAAH!! You haven’t learned a thing, have you? In this world, it’s KILL OR BE KILLED!” Omega Flowey, which was a huge, flower-like abomination with a TV for a face and the 6 Human Souls was the result of Flowey absorbing the 6 human Souls.
“HAHAHAHAHA!! AAAAAHAHAHAHAHA!!” The hideous being laughed in an insane manner. “GIVE ME YOUR SOUL!!” He immediately attacked with vines, bombs, and pellets. It was all so terrifying… But you stayed Determined. You were scared, yes, but you wouldn’t give up!
“HAHAHAHA!! YOU’LL NEVER ESCAPE ME, HUMAN!!” Omega Flowey was a tough and absolutely terrifying enemy with powerful attacks like bombs, bullet seeds, vines, and other plant-based attacks, but you had Determination… You had to beat him. For the fate of the whole world. Then, maybe… You could show him mercy. Then, after that, you could Reload, and bring Asgore back.