Kindly note that similar question exists in database of TibiaQa: https://www.tibiaqa.com/16064/how-many-vampire-lords-exists?show=16064#q16064
I believe Tibia Wiki will assist you with your question: https://tibia.fandom.com/wiki/Vampire_Lords
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Boreth's Location:
Lersation's Location
Marziel's Location
Arthei's Location
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