Tar Patch is a power in the Darkness Affinity power set.
Type: click Cast: 3.1 seconds, 7.8 endurance Recharge: 90 seconds Affects: location, 90' range, autohit
Pet power type: passive Pet power tick: every 0.2 seconds Pet power affects: 16 enemies, 25' radius, 4.75 area factor, autohit
Tar Patch was present at launch as a Dark Miasma power. It was proliferated as a Darkness Affinity power in Issue 22: Death Incarnate.