There is a
pull-request out to include vampires in the game.
They have a draining bite attack that transfers some of the victim's (usually the player's) HP. The amount of drain damage is half the
You can also catch vampirism, and half of your unarmed attacks will convert to bite attacks, which have a chance to do drain damage.
At the moment, vampires can only be found in Xinroch's tomb, but this could be conceivably be extended later to, for example, the catacombs if there is a demand for this.
Also, vampires and werewolves hate each other. A vampire's drain attack will do full damage against werewolves, and werewolves will inflict a drain-type damage exclusively against vampires, equal to normal amount of damage, effectively dealing double damage.
You can become Lycanthropic by being bitten by a werewolf in wolf form, which is a new all-pervasive effect.
At the moment there is no special bite attack implemented for normal humans who have lycanthropy.
SPOILER ALERT. Click here to see text.Humanoids can get both states by first becoming a vampire and then eating werewolf flesh, currently the only way to do it.
Vampirism negatively impacts the wisdom stat (a la leprosy), and each successful drain attack makes you more chaotic.
Some screenies below should give you the look and feel.
Next up: vampire bats.