Cowl of Emptiness

Head equipment — Rare

Your Slithering Marauders have, "At the start of your turn, create a random action that shares a name with an action in your deck and put it into your crypt."

Changes: Slithering Marauder
Slot: Head
Rarity: Rare
Set: Kickstarter
How obtained: Kickstarter

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