Witches have been updated to include a few more interesting things they can do with tainting the three types of Fortitude Quintessence. Now they can do combination effects with the Light & Dire quints.
To read the updates you can view their Racial Desc, scroll to 'Tainting Effects' and open the spoiler. This will likely be expanded upon once we get more quints discovered!
Credit to the original artists of all displayed artwork. Themes designed by The Maven.