When the Loser Revealed the Soul-Killing Brick, Black Lotus Hall Panicked

If You Want Two Female Protagonists to Cultivate Immortality, You Need Someone with a Strong Background or High Talent!

I want to see content similar to "My talent is average, but my background is strong". It's best if they're senior sisters, or people of the same age but from different sects. It's similar to the book I recommend below.