21 Plague Sword
Found on the body of a dead Skaven Plague Monk, this sword oozes with disease.
This double-handed sword may be carried by any Hero except for High Elves. If an enemy receives a wound from the Plague Sword he must make a disease roll after the battle. For every additional wound to the same enemy, he must -1 to his disease roll. For example, if an enemy takes 3 wounds from the plague sword, he must make a disease roll, even if he doesn’t search for treasure, and suffers a -2 penalty to that roll.
Any idea what "a disease roll" is?