Vampire

Basic Terminology

Vampire Lords. Ones that have turned into vampires from forming dark packs or oaths with Gods or greater powers sealed in malevolent acts with blood. Acts so vile, basically all essence of humanity is lost, for they serve the dark powers. This is sealed usually with a Blood Oath.
Vampire Spawn. Lesser vampires that are created from other vampires. They can be created from vampire lords.

Vampires lords can be created from other greater vampires or gods (listed above), but is very rare, as most are considered unworthy of such dark gifts, or few reach the level of depravity required to survive the transition. This can be done when a vampire bites a victim three times to the point of death. The last and final kiss they share their blood together in a final blood kiss. The transformation happens... the vampire lord is still under the strong influence of the maker though. The Tome of Strahd does not reveal how long this ritual takes.. days... weeks.. months? Perhaps Strahd himself does not even know...
Vampire spawn are created after a vampire lord or spawn drains a humanoid creature to the point of death then buries the corpse for one day in the earth or crypt. Afterwards it rises as a spawn of the Vampire Lord that night.

"Pay no attention... for your mortal coil is dying.. it happens to us all." -Lestat

The body of a vampire is changed, as its former body dies, and the dark powers bestow its gifts as the creature soul is kept by the Dark Powers, and therefore lost forever
Speed like lightning, intelligence, unquestionable charm are just a few of the benefits
Unholy regeneration.. there bodies take a form of youth, forming the best possible apex of their body, usually de-aging to their early 20s, no matter how old they were in real life. There body also reforms quickly, and stronger, older vampires can reform more quickly than others.

Wooden stake through he heart kills most vampire spawn, however, this is only known to paralyze greater vampires when they are at rest, for they cannot be killed, truly.....
Radiant damage, and sunlight
Swimming, and holy water

Calling: a maker can "call" their progeny by saying their name out loud, causing the progeny to become aware their maker is calling out for them. The progeny experiences a shiver, and may be able to tell where their maker is.
Commanding: a maker can force their progeny to do anything they want, as long as they say "as your maker, I command you", given that the progeny hasn't been released.
Strength: as strength increases with age, most makers are stronger than their progeny.
Empathic link: a maker can sense any pain or duress the progeny undergoes, and know when a progeny has died. It is unknown if a progeny can sense these in their maker.
Releasing: if a maker says "as your maker, I release you", their progeny will be released from the maker-progeny bond, and cannot be controlled anymore. Following release, a maker can still call their progeny, but the progeny will not be compelled to answer the call.

Bonding: if the user drinks fresh blood from a vampire, a psychic and emotional bond is created. The human will become sexually attracted to and have sexual dreams about the vampire. The vampire, in turn, will be able to sense the location, emotions and state of the human. This effect lasts for 1d6 days.
Enhanced abilities: the user will experience enhanced strength, senses, aggression, and libido, which will last as long as the blood is in their system.
Drug qualities: the user may experience hallucinations, which vary from person to person.
Healing: a human or supernatural creature that ingests vampire blood will be able to heal wounds at an accelerated rate.
Withdrawal symptoms: if the user is addicted to vampire blood and stops ingesting it, they will experience withdrawal symptoms, which are similar to those of heroin withdrawal (such as tremors, cramps, muscle and bone pain, perspiration, tachycardia, etc).