Is there a rule for 'Disease Rolls'?

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?

My first thought was Nurgle's Rot from the Carnival of Chaos, but that doesn't really fit in. For starters, it has nothing to do with searching for treasures. Also, such a weapon would be fairly campaign-breaking

FKSN wrote:

My first thought was Nurgle's Rot from the Carnival of Chaos, but that doesn't really fit in. For starters, it has nothing to do with searching for treasures. Also, such a weapon would be fairly campaign-breaking

We've been using the Major Artifacts rules from TC#14 since they came out, but since they are rare and random we haven't had too much problem with them.

In the last couple of campaigns I have made them objectives and as we find more of them I am amazed at how mangled the rules for some of them are, the above being a case in point.