I'm looking for a fantasy novel that involves martial arts and a grand, cosmic scale.

For a fantasy novel that blends martial arts with a grand, cosmic scale, "Emperor of The Cosmos" seems to be an excellent choice. The description immediately sets a futuristic stage where "humanity has conquered the stars," indicating a vast and expansive setting. The mention of an "ancient power awakens, blurring the lines between science and the supernatural" suggests a deep lore and a conflict that transcends ordinary understanding. The inclusion of "Martial Arts" in the tags confirms that this will be a central element of the story, likely involving powerful techniques and combat prowess.

This type of novel often combines elements of space opera with traditional martial arts fantasy, creating a unique genre blend. You can expect to see protagonists who train rigorously to hone their physical and spiritual abilities, often to levels that defy conventional physics, all within the context of interstellar travel and galactic conflicts. The "Xianxia" tag further solidifies the martial arts and cultivation aspects, promising a journey of growth and power accumulation for the protagonist on a truly epic scale. The "Adventure" and "Action" tags suggest a fast-paced narrative filled with exploration and thrilling encounters across the cosmos.