The opposite of an unlucky penny

I think I've read this essay before, but is the opposite of a lucky penny an unlucky penny or an ordinary penny? If the opposite of magic is ordinariness, there's a vote for ordinary, but if the opposite of "good magic" is "bad magic," then that's a vote for unlucky ... but in the scheme of things, there can be lucky, unlucky, and ordinary.

Let's just say there are no pennies that are not lucky.