Breath

Drop: World Drop

Zone: Winterspring [50-55]

Approximate Drop Rate: 1 in 10,000

Drop: Tsulong [??+]

Zone: Terrace of Endless Spring

Approximate Drop Rate: Unknown

Vendor: Slimy

Zone: Acherus: The Ebon Hold (Death Knight Order Hall)

Cost: 1000 (unlimited supply)

Drop: Time-Lost Wallet

Zone: The Deaths of Chromie Scenario

Approximate Drop Rate: Unknown

Drop: World Drop

Zone: Wetlands [20-25]

Approximate Drop Rate: 1 in 8,000

Drop: Maloriak [??+]

Zone: Blackwing Descent

Approximate Drop Rate: Unknown

Trading Card Game: March of the Legion

Pet Battle: [21-22] Sholazar Basin

Drop: Noxious Whelp [35]

Zone: Feralas

Approximate Drop Rate: 1 in 1,100

Quest: On the Brink [98]

Zone: Azsuna

Promotion: China PVP Event

World Event: Mists of Pandaria Timewalking

Vendor: Mistweaver Xia

Zone: Timeless Isle

Cost: 2200 (unlimited supply)

Drop: Razorscale [??+]

Zone: Ulduar

Approximate Drop Rate: Unknown

Guild Achievement: Dragonwrath, Tarecgosa's Rest - Guild Edition

Category: Dungeons & Raids

Vendor: World Vendors - Guild

Cost: 1500 (unlimited supply)

Profession: Pandaria Engineering [50]

Taught By: Engineering Trainers

Promotion: Burning Crusade Collector's Edition

Achievement: WoW's 5th Anniversary

Category: Feats of Strength

Drop: Mysterious Egg after 3 days becomes [Cracked Egg]

Contains: 1 in 5 options

Pet Store 

Pet Battle: [12-13] Dustwallow Marsh

Promotion: Battleground Event

Vendor: Black Market Auction House

Zone: Nagrand (Draenor), The Veiled Stair

Approximate Drop Rate: Unknown from [Unclaimed Black Market Container]

Promotion: iCoke China

Promotion: iCoke China

Pet Battle: [23-24] Twilight Highlands