Your search for "Sadistic Obsession 105" revealed the following:
Sadistic Obsession (MH1) from Modern Horizons, available at 401 Games Canada. Rarity: Uncommon Finish: Normal Artist: Matt Stewart Card Text:Enchant creatureEnchanted creature has “B, T: Put a -1/-1 counter on target creature.”
Sadistic Obsession (Foil) (MH1) from Modern Horizons, available at 401 Games Canada. Rarity: Uncommon Finish: Foil Artist: Matt Stewart Card Text:Enchant creatureEnchanted creature has “B, T: Put a -1/-1 counter on target creature.”