Rend

Drop: Proudmoore Admiralty Supplies

Zone: Tiragarde Sound

Approximate Drop Rate: Unknown

Shadowlands Profession: Protoform Synthesis

Taught By: [Archetype of Predation]

World Event: Children's Week

Quest: A Brighter Tomorrow [10]

Vendor: Jepetto Joybuzz, Leial Knitterton (H), Brundia Braidhammer (A)

Zone: Dornogal, Orgrimmar (H), Stormwind City (A)

Cost: 1 (unlimited supply)

Vendor: Pelefien

Zone: City of Threads

Cost: 2250 (limited supply: 1)

Pet Store 

Pet Battle: [25] Suramar

Drop: Treasure Chest

Zone: The Collapse - Suramar Scenario

Approximate Drop Rate: Unknown

Vendor: Lars Bronsmaelt

Zone: Hallowfall

Faction: Flame's Radiance (Renown Three)

Cost: 6500

Pet Battle: [3-6] Bloodmyst Isle

Drop: Auriaya [??+]

Zone: Ulduar

Approximate Drop Rate: Unknown

Pet Battle: Tazavesh, the Veiled Market (Dungeon)

Promotion: 2012 Shanghai China Battle.net World Championship

Trading Card Game: Scourgewar

Vendor: Trading Post

Zone: Orgrimmar (H), Stormwind (A)

Cost: 750 (unlimited supply)

Pet Battle: [25] Suramar

Pet Battle: [25] Suramar

Shadowlands Profession: Protoform Synthesis

Taught By: [Viperid Menace]

Quest: Critters of Draenor [1]

Zone: Lunarfall, Frostwall

Drop: Traveler's Pet Supplies

Approximate Drop Rate: 1 in 33