Your search for "Basal Sliver 96" revealed the following:
Basal Sliver - Surprise Slivers (Foil) (SLD) from Secret Lair Drop, available at 401 Games Canada. Rarity: Rare Finish: Foil Artist: Drew Tucker Card Text: Surprise SliversAll Slivers have Sacrifice this creature: Add BB.
Basal Sliver (TSP) from Time Spiral, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Drew Tucker Card Text:All Slivers have "Sacrifice this creature: Add BB to your mana pool."
Basal Sliver (Foil) (TSP) from Time Spiral, available at 401 Games Canada. Rarity: Common Finish: Foil Artist: Drew Tucker Card Text:All Slivers have "Sacrifice this creature: Add BB to your mana pool."