Vampire Socialite (DBL) from Innistrad: Double Feature, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Suzanne Helmigh
• Card Text:
  Menace (This creature can't be blocked except by two or more creatures.)
  When Vampire Socialite enters the battlefield, if an opponent lost life this turn, put a +1/+1 counter on each other Vampire you control.
  As long as an opponent lost life this turn, each other Vampire you control enters the battlefield with an additional +1/+1 counter on it.