Picture of Vampiric Essence info box

Vampiric Essence allows the player to play as a Vampire. Vampires are great for melee classes because of the Red Feast's ability to add drain to any melee weapon. You can get Vampiric Essence from any of the following monsters (or you could buy it from a player for 1-1.5million g.)

Champ drops it at 0.9%
Lesser Vampire drops it at 0.01%
Ancient Vampire drops it at 0.01%
Undead Lord drops it at 1%
Ancient Necromancer drops it at 2.9%