How does Extend Conditions work?

Extend conditions is an elite spell, but I do not understand how it functions.
Since it's not a hex spell, I am not sure to use it before I cast the condition or after.
So, do I cast this first then the condition, or,
Cast the condition first and then cast Extend Conditions?

Nevermind, I have discovered the answer myself rather quickly.
It's condition first, then Extend Conditions.
I wonder why I didn't do this before lol.