Curse of Doom

Zone: Torghast

Approximate Drop Rate: Unknown

Pet Battle: Baa'l

Pet Battle: [23-25] Frostfire Ridge

Drop: Secret Treasure

Zone: Revendreth [50-60]

Approximate Drop Rate: Unknown

Achievement: Malowned

Category: Battle

Vendor: Veridis Fallon

Zone: Azsuna

Faction: Court of Farondis - Revered

Cost: 500 (unlimited supply)

Profession: Archaeology - Tol'vir

Artifact: [Crawling Claw]

World Event: Hallow's End

Quest: The Creepy Crate [1] (Alliance)/(Horde)

Drop: Conflagros [50+]

Zone: Darkshore Warfront

Approximate Drop Rate: Unknown

Drop: Sha of Pride [??+]

Zone: Siege of Orgrimmar (Flexible, Normal or Heroic)

Approximate Drop Rate: 1 in 125

Drop: N'Zoth the Corruptor [??+]

Zone: Ny'alotha, the Waking City

Approximate Drop Rate: Unknown

Drop: Cho'gall [??+]

Zone: The Bastion of Twilight

Approximate Drop Rate: Unknown

Vendor: Sean Wilkers

Zone: Eastern Plaguelands

Cost: 3 (unlimited supply)

Trading Card Game: Betrayal of the Guardian

Quest: DANGER: Kosumoth the Hungering [45]

Zone: Eye of Azshara

Trading Card Game: Worldbreaker

Drop: High Astromancer Solarian [??+]

Zone: Tempest Keep

Approximate Drop Rate: 1 in 11

Pet Store 

Pet Battle: [6-7] Hillsbrad Foothills

Pet Battle: [1-2] Undercity; [1-2] Tirisfal Glades

Zone: Torghast

Approximate Drop Rate: Unknown

Drop: Blindlight [50]

Zone: Nazjatar

Approximate Drop Rate: Unknown

Drop: Fel-Touched Pet Supplies

Zone: Tanaan Jungle [40]

Approximate Drop Rate: Unknown

Drop: Mother Shahraz [??+]

Zone: Black Temple

Approximate Drop Rate: 1 in 25

Pet Battle: [25] Stormheim

Pet Battle: [20-22] Borean Tundra; [20-22] Howling Fjord; [21-22] Sholazar Basin; [21-22] Grizzly Hills; [22-23] Zul'Drak; [22-23] The Storm Peaks; [22-23] Icecrown; [22-23] Dragonblight; [22-23] Crystalsong Forest