Olivia, Mobilized for War (SOI) from Shadows over Innistrad, available at 401 Games Canada.

• Rarity: Mythic Rare
• Finish: Normal
• Artist: Eric Deschamps
• Card Text:
  Flying
  When another creature enters the battlefield under your control, you may discard a card. If you do, put a +1/+1 counter on that creature, it gains haste until end of turn, and it becomes a Vampire in addition to its other types.