Slice Design Card Tie The Knot The Green Thumb Design Card includes MS+ features. Introducing the new MS+ Design Cards. The MS+ Design Cards include a Mirroring, Shadowing, and Speed upgrade. The MS+ cards will install the Speed Boost update on your SLICE so it will be faster regardless of the Design Card you use. The Mirroring and Shadowing will only work on the MS+ Design Cards. 5. Speed Boost For use with the SLICE Elite. Mirroring allows you to flip an image making embossing and debossing simple.