Vampire's Domain (OP15-EN024) - OTS Tournament Pack 15 Unlimited

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.