Lead Sapper Kar'Lob

In solo version of the instance: In heroic version of the instance: Guaranteed drop of a loot chest.
 * Rare (roughly 1 in 4 chance per visit)
 * Has no arrows, but comes with 1-2 friends who are down-arrow.
 * Common (roughly 2 in 3 chance per visit)
 * Is ^^^ heroic, and comes with 3 friends who have no arrows.