Contagion

Use
Combine with skills, that let's you put conditions on yourself.

Acquisition
Signet of Capture:
 * Terob Roundback (The Floodplain of Mahnkelon)
 * Brokk Ripsnort (Wilderness of Bahzda)
 * Harrk Facestab (Forum Highlands) (Only during the quest Desperate Measures)
 * Mabah Heardheart (Garden of Seborhin)