Not that this is a very important point, but I think we all accept as given that in general, the swords of the Warward are metal, just as their breastplates (which are specifically said to be so). So, is the 'traditional' blade of a Warmark made from the actual wood ebony, or is SRD just using that word as a more interesting version of 'black'?
If he had said 'ebon sword/blade', I'd not give this minor point any thought at all. I'd just assume that a black sword was, like the yellow headband, part of a Warmark's uniform. He specifically said ebony. The Woodhelvennin used wood blades, so I would reckon there is no reason at all that a Warmark might well wield a sword made of wood. Ebony is pretty hard as is, and I'd presume some sort of lillianrill rite could harden it further to contend with all the rigors a sword would have to endure.
As I said, this is a VERY minor point, but one that intrigued me. Either SRD is just using a fancy word instead of black, or the sword is actually crafted of wood. I'm leaning toward the latter. I don't know enough about metallurgy to know what would make a sword blade black other than long periods of time with no oxidation (something I read in an Ewart Oakshott book on knightly weapons), but this IS The Land, so many possibilities exist.
I'm pretty sure someone would have noticed if Troy had been toting Stormbringer or Gurthang around, so that explanation is right out.
