[quote=@IncredibleBee]
<Snipped quote by Raineh Daze>

Yeah, but in that case it would need to boost the weapon's durability to unbelievable levels. Guts smashed corundum during one fight.
[/quote]

Corundum is brittle; it's like hitting diamond. It [i]will[/i] break. What you need is something about as resilient to force/cutting as a seven-ish foot long iron blade. Given the forces magic weapons tend to be required to endure, it's not that unlikely.