FFX
Bring me friends, and I'll help you.
And by help, I mean hurt.
Sorry, I can't resist the urge
to always seem curt.
You'll get to know me very well,
and pay me like a king,
but you'll be the one
who will want to sing.
Find my friends, I'm begging you,
so I won't be alone.
Cull the herd well enough,
I'll give you a useless stone.
Who am I?