Your search for "Sinew Sliver 837" revealed the following:
Sinew Sliver (Foil) (PLC) from Planar Chaos, available at 401 Games Canada. Rarity: Common Finish: Foil Artist: Steven Belledin Card Text:All Slivers get +1/+1.
Sinew Sliver (CMM) from Commander Masters, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Steven Belledin Card Text:All Sliver creatures get +1/+1.