Dementia Sliver (TSP) from Time Spiral, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Una Fricker
• Card Text:
  All Slivers have "T: Name a card. Target opponent reveals a card at random from his or her hand. If it's the named card, that player discards it. Play this ability only during your turn."