Vampire's Domain - OP15-EN024 - Common - Unlimited from OTS Tournament Pack 15, available at 401 Games Canada.

• Rarity: Common
• Card Text:
  Once per turn: You can pay 500 LP; during your Main Phase this turn, you can Normal Summon 1 "Vampire" monster in addition to your Normal Summon/Set. (Even if this card leaves the field. You can only gain this effect once per turn.) Each time your "Vampire" monster inflicts battle damage to your opponent: Gain the same amount of LP.