Your search for "Watcher Sliver 49" revealed the following:
Watcher Sliver (Foil) (TSP) from Time Spiral, available at 401 Games Canada. Rarity: Common Finish: Foil Artist: Liz Danforth Card Text:All Slivers get +0/+2.
Watcher Sliver (TSP) from Time Spiral, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Liz Danforth Card Text:All Slivers get +0/+2.
Watcher Sliver (Foil) (TSR) from Time Spiral Remastered, available at 401 Games Canada. Rarity: Common Finish: Foil Artist: Liz Danforth Card Text:All Sliver creatures get +0/+2.
Watcher Sliver (TSR) from Time Spiral Remastered, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Liz Danforth Card Text:All Sliver creatures get +0/+2.