Moon Tears

Vendor: Mei Chele

Zone: The Wandering Isle (Monk Order Hall)

Cost: 1000 (unlimited supply)

Sanctum Feature: The Ember Court (tier 3)

Zone: Revendreth

Covenant: Venthyr

Drop: Tribute Chest

Approximate Drop Rate: Unknown

Sanctum Feature: Queen's Conservatory (tier 2)

Zone: Ardenweald

Covenant: Night Fae

Drop: Queen's Conservatory Cache (Untamed Spirit)

Approximate Drop Rate: Unknown

Sanctum Feature: Path of Ascension (tier 3)

Zone: Bastion

Covenant: Kyrian

Sanctum Feature: Abomination Factory

Zone: Maldraxxus

Covenant: Necrolord (tier 1)

Vendor: Atticus

Cost: 1000 (unlimited supply)

Faction: Stitchmasters - Honored

Vendor: Aithlyn

Zone: Ardenweald

Faction: The Wild Hunt - Friendly

Cost: 250 (unlimited supply)

Drop: Ephemera Orb

Zone: Zereth Mortis

Approximate Drop Rate: Unknown

Pet Store 

Drop: Moonfang [??+]

Zone: Darkmoon Island

Approximate Drop Rate: 1 in 17

Pet Battle: [23-25] Shadowmoon Valley (Draenor)