We’d like to make some clarifications on the Plague Doctor’s Black Death Steam skill.
It turns out that the current version of Black Death Steam that is implemented in-game is working as intended.
In fact, the version that had been in-game before the maintenance on August 1, 2017 was a bugged version which allowed Black Death Steam to spread much too easily.
It took us a long time to reach this conclusion because we wished to be sure that the skill was working as intended. The dev & QA teams have gone through the source code and tested it on various versions to make sure that the current version is not bugged.
Our apologies for the time it took for us to clarify this issue.