Proof of completion of the second mission is a level 50 Common item in AION Retail 7.8. The quest On Behalf of the Order rewards it.

Where to get

Rewarded by

Quest	Reward	Quantity
On Behalf of the Order	Basic reward	5

Similar items

Item	Grade	Level
Construction Odium of Magic	Common	50
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Tanned Noble Solid Balaur Skin	Heroic	50
Jerky for Pets	Fabled	50
Eternal Panacea: Masterful Attack Boost	Eternal	50
Bagatur's Spirit Stone	Mythic	50
Fragrant Root	Junk	50