Mark of Destruction

Trinket equipment — Rare

Your Rust and Ruins instead have, "Destroy all artifacts and constants.

Underworld Allegiance: Summon two Dreadlings for each artifact in opposing crypts. Summon two Dreadlings for each constant in opposing crypts."

Changes: Rust and Ruin
Slot: Trinket
Rarity: Rare
Set: Herofall
How obtained: Set 5 Chest Loot

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