[Western Crossover] I Save the World by Transforming

The main story is complete, so read with peace of mind! Blurb: To save his world from imminent destruction, Bai Kui made a contract with Alaya and began collecting Holy Grails in different worlds by borrowing the powers of Heroic Spirits. Although... borrowing a Heroic Spirit's power meant first learning to use their abilities from scratch, and the conditions for unleashing a Noble Phantasm were even more demanding. ...Then he discovered that acting as a Heroic Spirit helped him master their power faster. And so Bai Kui went further and further down the road of splitting his personality. Bai Kui: What do Astolfo in a dress, Mordred searching the whole world for her father, and Merlin breathing through his gills have to do with me, Bai Kui? ※No secret identities are exposed. The main story is complete, so read with peace of mind. It's a story about Heroic Spirits and superheroes healing one another, with plenty of references and memes. ※The Acting Method pays homage to Lord of the Mysteries (in a very small way). Some Noble Phantasm incantations for the Heroic Spirits are my own translations or sourced online. Any discrepancies are due to personal preference. ※The American comic universe's setting draws on various comic, movie, and game versions, so there may be conflicting details (for example, a mix of P52, N52, and rebirth). If you come across a setting you don't like, please be gentle with the author. The next crossover story is now open for business: Feng Huo, a shonen manga enthusiast, gets a villainous Heroic Spirit System. He must wear these Heroic Spirits' secret identities and make headlines big enough to destroy the world, then... get defeated by the protagonist's team. The System is still trying to persuade him to play this doomed role. Who could have guessed that Feng Huo has already come up with a whole series of grand plans, along with his own Villain's Code? Feng Huo: Master, I've had an epiphany. What do you think of me doing this and that? System: ...Works for me. Couldn't be better. Go for it. And so, Mr. Amakusa decides to use Tengen's body to create a Holy Grail and