Right now? You don't need to go and get some tools first or anything like that? [Not that it's particularly Ed's concern, but now he's even less confident that the man knows what he's doing.

And uh oh, looks like somebody's hit an angsty nerve. His grip on his detached arm tightens a little.] Who's calling who ignorant? You really think anything you could possibly exchange is enough for a real person's life? That's basic alchemy.