This quest is not available in game.
Slay 6 Southsea Mercenaries.
- Kill Southsea Mercenary × 6
Even now, Aggra and Kilag assault the docks to clear the way for Thrall to engage the Trade Prince. The plan is for you to assist in that attack, but first, we must ensure that Gallywix's Southsea mercenaries do not reinforce him.
Go down into the Slave Pits and make certain that they don't!