I found the 6 Searing Collars on each of the of 6 Searing Blade Orcs I killed while on the Horde 15Skull Rock quest. So this appears to be a 100% drop rate.

Kindragon 13:03, 24 Nov 2005 (EST)

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.