This is the 3-CASE INCENTIVE ITEM from GRIMM COLLECTOR CARDS. It is a SEALED PADDED ENVELOPE that contians a random AUTHENTIC LIMITED EDITION HAND DRAWN "SKETCH" CARD from GRIMM SEASON 1 COLLECTOR CARDS (Breygent/2013).
Sketch cards were mainly available as a multi-case purchase incentive with only a small handful inserted on top of sealed boxes.
There is no doubt that the artwork on this card is genuine. The BREYGENT statement of authenticity is right on the back of the card. The item you are bidding on is a still-sealed product that contains a single sketch card.
Complete list of artists with sketch cards in this series:
Aston Roy Cover