Craftsman's Writ - Major Mana Potion (quest)

Objectives
Deliver 10 Major Mana Potions and the Craftsman's Writ - Major Mana Potion - to Packmaster Stonebruiser at Light's Hope Chapel in the Eastern Plaguelands.

Description
The bearer of this writ is entitled to payment in the form of an insignia of their choice upon completion of the contracted work order. Work Order AL-473: 10 Major Mana Potions. All filled orders should be delivered to Packmaster Stonebruiser at Light's Hope Chapel in the Eastern Plaguelands. Contract is null and void if tampered with or damaged. -Dispatch Commander Metz, The Argent Dawn

Progress
Filling a work order, ?

Completion
The utility of these should go without saying.