Olivia, Mobilized for War 248/297 (Shadows over Innistrad)

Flying Whenever another creature you control enters, 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.

NM - $2.20
LP - $2.20
MP - $1.50
HP - $2.20
DMG - $2.20