Another possible way to unlock Unicorn Chomper?

I couldn't care less about UC becoming available again.  I mastered it in the hero showcase, and except for its uniqueness, there's nothing really to recommend it over any other bite chomper.  It's not like I go and walk through my stats room admiring the bobbleheads, so as far as I'm concerend, so what?

I'm not saying it's wrong for other people to want him, that's just my opinion.