i crave a boon - to ask for something like you're the last person on Earth an

to ask for something like you're the last person on Earth and you're about to die

I crave a boon, I need you to let me out of this detention

I crave a boon, I will die if you don't help me with this math problem

I crave a boon, I'm literally going to quit school if you don't give me a break