Voidstone Blade

Weapon equipment — Rare

Your Chaotic Rips instead have, "Interrupt target card. The interrupted card transforms into a random Chaostouched. It gets cost . Put it into your hand."

Changes: Chaotic Rip
Slot: Weapon
Rarity: Rare
Set: Frost Ring Arena
How obtained: Frost Ring Arena

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