So, on heroic, Professor Putricide casts Unbound Plague twice in a row, a minute or so apart, whenever he casts it. So you have to play hot potato with the plague for two minutes without getting people with Plague Sickness to grab it.
[19:44:21.389] Professor Putricide casts Unbound Plague
This is the second plague of a set.
[19:44:21.399] Moonkin’s Unbound Plague fades
This is the first plague the moonkin has passed to a warlock.
[19:44:21.399] Moonkin afflicted by Plague Sickness from Moonkin
This is the moonkin getting Plague Sickness at the same instant he has passed the plague off.
You may notice that this is 0.01 seconds after Professor Putricide has cast the second Unbound Plague.
[19:44:21.413] Moonkin afflicted by Unbound Plague from Professor Putricide
This is the moonkin getting the NEW plague almost immediately after passing the old one off to the warlock. He does NOT have Plague Sickness at the second that Putricide casts Unbound Plague. .01 seconds before he gets Plague Sickness, Putricide cast the new plague. The rule has always seemed to be that if you have Plague Sickness, you cannot get a new plague.
How’s that for some crappy luck? Gah.