Your search for "Sidewinder Sliver 43" revealed the following:
Sidewinder Sliver - Surprise Slivers (Foil) (SLD) from Secret Lair Drop, available at 401 Games Canada. Rarity: Rare Finish: Foil Artist: Ron Spencer Card Text: Surprise SliversAll Slivers have flanking. (Whenever a creature without flanking blocks a Sliver, the blocking...
Sidewinder Sliver (TSP) from Time Spiral, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Ron Spencer Card Text:All Slivers have flanking. (Whenever a creature without flanking blocks a Sliver, the blocking creature gets -1/-1 until end of turn.)...
Sidewinder Sliver (Foil) (TSP) from Time Spiral, available at 401 Games Canada. Rarity: Common Finish: Foil Artist: Ron Spencer Card Text:All Slivers have flanking. (Whenever a creature without flanking blocks a Sliver, the blocking creature gets -1/-1 until end of...
Sidewinder Sliver (TSR) from Time Spiral Remastered, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Ron Spencer Card Text:All Sliver creatures have flanking. (Whenever a creature without flanking blocks a Sliver, the blocking creature gets -1/-1 until end...
Sidewinder Sliver (Foil) (TSR) from Time Spiral Remastered, available at 401 Games Canada. Rarity: Common Finish: Foil Artist: Ron Spencer Card Text:All Sliver creatures have flanking. (Whenever a creature without flanking blocks a Sliver, the blocking creature gets -1/-1 until...