Morganti weapons are a type of weapon capable of "eating" the soul of any person they cut. They were created by the Serioli. It is said that they were created in an attempt to "make war so horrible no one would ever engage in it" (Dragon). In a world where reincarnation and later revivification are both known and often expected, a soul-killing weapon which prevents both takes on a considerable extra horror. The Great Weapons are a special case of Morganti weapons. The Jhereg use Morganti weapons on snitches, so there aren't many snitches.