BL manhwa refers to Boys' Love comics or graphic novels that come from South Korea and feature romantic or intimate relationships between male characters.
Well, a rut bl manhwa usually features male-male romantic relationships and explores various themes related to love and emotions. It's a popular genre in the world of manga.
I highly recommend 'Qi Ye'. It's a great historical BL novel. The plot is set in a historical Chinese context and is full of political intrigue. The relationship between the main characters is both tender and complex. It gives a great insight into the power struggles and social hierarchies of the time.
To survive as a villain in a BL manhwa, you have to be strategic. Understand the weaknesses of the heroes and exploit them. Also, build alliances when it suits you, but be ready to betray them if necessary.