[quote=@Zarkun]
<Snipped quote by Joshua Tamashii>

Yes, but Natsu is also spiteful and perverted. Karn isn't.
[/quote]

I'm not so sure, since it was the residual heat from his flames that did the melting. Silver stated Karn's flames were as hot as the sun. Might be an exaggeration, might not. Either way, we wanted the fight to end so the games could move on, so this is what we went with.