Point one domain to 2 separate hosts

I am having hard time doing one thing

I want my Domain A Record pointing to 2 hosts

example.com - 1 Host (Netlify)

example.com/blog - 2nd Host (Another)

Can you help me on that?

There is a way to do this using a proxy:

but this becomes a reference via Netlify, and the response becomes worse.
It may also behave unintentionally.

It is recommended to use a sub domain instead of this method.

Additional relevant information:

I am amazed by your support
Thanks a Million @balloon