Hastur's Tears

Trinket equipment — Legendary

Your Harbingers of Hastur instead have, ", 20% chance: At the start of each opposing champion's turn, if this is in the top five cards of your deck, reveal this. Exhaust a random opposing troop. Put this into play."

Changes: Harbinger of Hastur
Slot: Trinket
Rarity: Legendary
Set: Armies of Myth
How obtained: Set 3 Chest Loot

What it does is the game's own text; how it was obtained is from the owner's records.