Damping Matrix Tweet Near Mint - In Warehouse, English, 2 In stock $0.89 Lightly Played - In Warehouse, English, 4 In stock $0.85 Details Color: Artifact Card Text: Activated abilities of artifacts and creatures can't be activated unless they're mana abilities. Rarity: R Card Type: Artifact Name: Damping Matrix Finish: Regular Card Number: 218/249 Set Name: Modern Masters 2017