Your search for "Harmonic Sliver 663" revealed the following:
Harmonic Sliver - Surprise Slivers (Foil) (SLD) from Secret Lair Drop, available at 401 Games Canada. Rarity: Rare Finish: Foil Artist: Luca Zontini Card Text: Surprise SliversAll Slivers have “When this permanent enters the battlefield, destroy target artifact or enchantment.”...
Harmonic Sliver - TSP Reprint (Foil) (PLST) from The List, available at 401 Games Canada. Rarity: Uncommon Finish: Foil Artist: Luca Zontini Card Text:All Slivers have "When this creature comes into play, destroy target artifact or enchantment."
Harmonic Sliver (Foil) (TSP) from Time Spiral, available at 401 Games Canada. Rarity: Uncommon Finish: Foil Artist: Luca Zontini Card Text:All Slivers have "When this creature comes into play, destroy target artifact or enchantment."