Your search for "Tail Slash 161" revealed the following:
Tail Slash (DTK) from Dragons of Tarkir, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Efrem Palacios Card Text:Target creature you control deals damage equal to its power to target creature you don't control.
Tail Slash (Foil) (DTK) from Dragons of Tarkir, available at 401 Games Canada. Rarity: Common Finish: Foil Artist: Efrem Palacios Card Text:Target creature you control deals damage equal to its power to target creature you don't control.