Corrosion

Drop: Alleria or Thrall's Corrupted Chest

Zone: Horrific Vision of Stormwind or Orgrimmar

Approximate Drop Rate: Unknown

Source: Unknown

Drop: Will of N'Zoth [50]

Zone: Vale of Eternal Blossoms

Approximate Drop Rate: Unknown

Pet Battle: [25] Ardenweald

Drop: World Drop

Creature: Oozes, Slimes and Worms

Approximate Drop Rate: [Oozing Bag] 1 in 25

Approximate Drop Rate: [Disgusting Oozeling] in bag 1 in 85

Overall Approximate Drop Rate: 1 in 2,125

Drop: Sha of Pride [??+]

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

Approximate Drop Rate: 1 in 125

Drop: Pollous the Fetid [10-45]

Zone: Val'sharah

Drop Rate: 1 in 1

Drop: Quivering Filth [32-35]

Zone: Isle of Thunder

Approximate Drop Rate: 1 in 335

Drop: Gol'than the Malodorous [??+]

Zone: Tol Dagor (Mythic)

Approximate Drop Rate: Unknown

Vendor: Master Clerk Salorn

Zone: Ardenweald

Covenant: Night Fae

Sanctum Feature: Anima Conductor (tier 1)

Cost: 250 (unlimited supply)

Quest: A New Age [60]

Zone: Bastion

Covenant: Kyrian

Drop: Wild Hunt Supplies

Zone: Ardenweald

Approximate Drop Rate: Unknown

Pet Battle: [11-12] The Hinterlands

Drop: The Lanticore [??+]

Zone: Upper Blackrock Spire

Drop Rate: 1 in 1

Drop: Gormbore [61]

Zone: Ardenweald

Approximate Drop Rate: Unknown

Drop: Primordius [??+]

Zone: Throne of Thunder (LFR)

Approximate Drop Rate: Unknown

Drop: Memory Cache

Zone: Azj-Kahet

Drop Rate: 1 in 1

Pet Battle: [20-22] Borean Tundra

Drop: Bog Beast [60]

Zone: Revendreth

Approximate Drop Rate: Unknown

Pet Battle: [25] Azj-Kahet

Drop: Deadly Dapperling [50-60]

Zone: Maldraxxus

Approximate Drop Rate: Unknown

Drop: Tred'ova [??+]

Zone: Mists of Tirna Scithe (Mythic)

Approximate Drop Rate: Unknown

Vendor: World Vendors

Cost: 50 (unlimited supply)

Drop: Hydross the Unstable [??+]

Zone: Serpentshrine Cavern

Approximate Drop Rate: 1 in 11

World Event: Love is in the Air

Dropped By: Apothecary Hummel [??+]

Zone: Shadowfang Keep

Drop Rate: 1 in 65 dropped (available 14 days per year)