Union's Aeon Hero and the Galactic Cult (Kirby X Union X multi-crossover)

(there will be no abuse, no neglect, no bullied, no betrayed, no reader, and absolutely no main character OC, just your favorite ruthless, relentless, OP Knight and some random cult Beating the crap out of Union people, both the fake heroes and villains, and girls that'll do anything to please this Ancient winged-Knight Warrior) (and yes this is harem, but there is a reason to it, I promised)

Thousands of years ago, a great epic war between the Three Factions, the Legendary Star Warriors and the Forces of Evil have battled for freedom of good, and domination of evil in this interdimensional universe.

However, everything changed when one Star Warrior decided to challenge them for freedom: the Aeon Hero, an Angelic winged Knight with a powerful lance, said to be "The Greatest Warrior in the Galaxy". He fought and killed thousands of devils, angels, fallen angels, all forces of evil, and some Corrupted minded-Star Warriors, even killed millions of evil Gods Biblical God, the Four Great Satans and Kokabiel, who is the warmonger with six wings, cannot defeat this Lance-wielder.

But, as we all know, it doesn't last for long. the Celestial Gods and some those that never involved became fearful of him because of his great immense power. To make sure he doesn't go mad with power or others try to use him for their personal gains, they sealed him in the gem seal, before sending him in space and time, never to be seen again for thousands of years..... until now.

For a Disclaimer, everything is not mine. they belong to their respectable companies