1) The band's first album was so ultraobscure that only a few dedicated fans knew about it.

2) The writer's short stories were beautifully crafted but remained ultraobscure in literary circles.

3) The artist's abstract paintings were considered ultraobscure by mainstream art critics.

4) This indie film is so ultraobscure that it's hard to find any information about it online.

5) The experimental electronic music genre is often labeled as ultraobscure by music enthusiasts.

6) The fashion designer's avant-garde designs were often dismissed as ultraobscure by traditionalists.

7) The philosopher's theories were so complex and nuanced that they remained ultraobscure to most people.

8) The restaurant's menu featured ultraobscure ingredients that required a sophisticated palate to appreciate.

9) The scientist's research in quantum mechanics is considered ultraobscure and difficult to understand by many.

10) The novelist's early works were ultraobscure, but they slowly gained popularity over time.