Quote Originally Posted by Rowan View Post
I like that, Kgauck. It would certainly explain why an elf would endeavor to create tighmaevril. It also seemed odd to me that they'd be so interested in making a weapon for the sole purpose of bloodtheft.
One of the few things we do know for sure about tighmaevril is that whatever its original purpose was, it wasn't bloodtheft. According to the Rulebook (p. 31), all the weapons were created more than 500 years *before* Deismaar, when there were no bloodlines to steal: "The weapons were first prized for their strength and beauty. Their unusual properties remained undiscovered until one such waepon was used to kill a scion." Vastly increasing the efficiency of bloodtheft is just an accidental side-effect, unless some really powerful prophecy was involved. Being especially attuned to killing undead makes at least as much sense as anything else I can think of.

Quote Originally Posted by Rowan View Post
If you want to apply an existing game effect to explain it, tighmaevril could act as a disrupting weapon.
3e DMG says only bashing weapons can be weapons of disruption, while tightmaevril weapons are generally piercing or slashing -- but since they're artifacts and it's thematically appropriate, I see no reason they shouldn't bend that particular rule. I've not yet had a bloodsilver weapon actually appear in an adventure, but I'll certainly include undead disruption if I ever do.

Quote Originally Posted by Rowan View Post
Tighmaevril, then, acts to strengthen the Evanescence, forcing a complete separation between soul and bloodline upon death as it acts as the Sundering barrier between the two worlds.
Oooh, this I like. Maybe then the original motivation was to create the perfect reusable material focus for a spell to help close portals from the Shadow World! That makes a lot of sense.