[quote=@Raineh Daze]
[quote=@IncredibleBee]
[quote=@Raineh Daze]
I'm wondering how long until Guts needs a new sword because he's hit something that it: A) can't cut, and B) is durable enough to shatter it.
[/quote]

A several hundred pound mass of iron won't just shatter when it hits something. On top of that, the Dragonslayer's been enhanced to cut through magical stuff. Guts isn't gonna need a new sword anytime soon.
If anything, I could see it getting augmented if I run into a good enough smithy.
[/quote]

When I say 'anything', I mean 'any of the numerous things in the universe that are probably harder than Apostle flesh'. Much like taking that thing to a cliff face: it's going to get wrecked sooner or later, even if it deforms before it shatters. Though, admittedly, iron is a lot less brittle than steel.
[/quote]

Apostle flesh is actually quite durable; most mundane weapons have a hard time hurting them. When Guts took on his first few bottom ranked not even apostle demons, a normal greatsword wasn't enough; only the Dragonslayer had the mass necessary to cleave through it.
Actually I can probably find Guts cleaving through rock and other hard materials without scuffing up the Dragonslayer. In fact, I recall he sliced through the hide of a dragon made out of crystals in one chapter.