Do many Muslims carry around crescent moons in the same way Christians have cross necklaces? I genuinely don’t know.
I remember a movie called Dracula 2000 where a vampire was confronted with a cross as he was about to bite someone. The vampire retorted that the cross didn’t work on him since he was an atheist, whereby the victim said “God loves you anyway” and stabbed him with a blade hidden in the cross.
I have read of rustic Muslims using pages from the Koran as poultices, believing that it would make the wound heal faster. It would not surprise me if someone tried to use it as a spook-repellant.
It’s interesting to see how the trope evolved in the early Universal monster movies. In the Lugosi Dracula, he seems to show real fear, and runs away from a crucifix. In Dracula’s Daughter, they don’t flee from it, and they can even touch it, but they cannot look at it. In later movies, the human has to consciously brandish it.
Roman Polanski’s take on a Jewish vamire, from The Fearless Vampire Killers: Or, Pardon Me, but Your Teeth are in my Neck
So Fantasy Role Playing Games would have it as a Holy Symbol you believe in. I think 1st Ed was only LG symbols or the Cross. Though D&D 5th Ed has dropped Holy Symbols completely. No Garlic either.
For a Middle Earth game facing a Hollywood Vampire, it would be the phrase “A Elbereth Gilthoniel” though Middle Earth Vampires are nothing like Hollywood Vampires.
Worth noting that as the Seal of Solomon hexagrams and pentagrams was heavily used in Islamic and also at times medieval Christian symbology (where the pentagram was definitely more common, but not exclusively so) as well and were associated with protection. You can find them all over the place in Ottoman usage - including stamped on rifles 
. According to at least one medieval source hexagrams were also on the flags of the Turkic Anatolian states of Karaman and Sinope.
The modern association of hexagrams with Judaism has largely overshadowed that older history. The Moroccan flag for instance features the Seal of Solomon, but in pentagram form rather than a hexagram. But it is likely (the historiography is hazy) that the Jewish tradition borrowed it from Islamic influence rather than the other way around.
Two schools of thought, here.
No they haven’t. Holy symbols act as the casting focus item for clerics and paladins and are a requirement for turning undead:
As an action, you present your holy symbol and speak a prayer censuring the undead.
(for the non-RPG nerds, that’s “turning” as in “causing to turn and flee”, not turning as in “to become…”)
Why-because a particular religious sect’s beliefs are the only reason a vampire could exist? Actually, the existence of vampires seem to go against the official teachings of most Christian sects.
But they have no direct effect on Vampires like they did in some earlier versions. I meant they dropped holy symbols holding off vampires
Richard Matheson’s novel “I Am Legend” had a protagonist who realized religious symbols only worked against vampires from that particular religion; as a result he surrounded his fortified home with crosses, stars of David, Q’rans, Buddhist prayer wheels, etc. He lived in fear of encountering an atheist vampire… (Shamelessly lifted from another website. The poster was anonymous, so I can’t credit him.)
Gotcha.
Ironically, in the The Lost Boys movie, the vampires feed the hero noodles and temporarily make him think they are worms, in order to make him unperturbed about drinking from the bottle of blood which will turn him into a vampire.
Requiring you to be a cleric for a holy symbol to matter sounds like a variation on the “true belief” concept, jusy with extra steps. It makes some sense.
And in a Terry Prachett (RIP) book Carpe Jugulum the Vampires have trained themselves to recognize and resist holy symbols, but this also means they can see them everywhere.
Not as a testament of religious faith, AFAIK. Islamic religious tokens are more likely to be some calligraphic rendering of holy text in Arabic, such as a Name of God, the Bismillah, or some other phrase from Muslim scripture. Such Islamic talismans would probably be analogous to Christian crosses as vampire repellents in multidenominational vampire lore.
As a Straight Dope Staff Report put it more than twenty years ago,
AFAICT the Islamic use of the star-and-crescent is a bit akin to the Christian use of steeples and spires on houses of worship. The steeple/spire has become a recognized visual marker of a Christian church, and some theological folklore has grown up around its religious symbolism (“pointing to heaven” etc.), but it’s not an official symbol of Christianity. You wouldn’t hold up a little model of a church steeple to stop a vampire, except maybe for the teensy cross on top of the spire.
A Muslim might be likely to categorize a vampire as a ghoul (Arabic: غول, ghūl) , which is a more common undead creature in Middle Eastern folklore. I don’t think vampires are a “thing” in Arabic culture. Using a holy symbol might not even be a strategy they would try against a vampire/ghoul. Per folklore, the sole defense that one had against a ghoul was to strike it dead in one blow, so a Muslim might go for the “chop it’s head off” option.
(I ran a D&D game that took place in the Middle East, in which the characters could only kill a ghoul with an attack that did enough damage to exceed the ghoul’s hit points in a single strike. Anything less was totally ineffective.)
If the potency of the symbol depends on its importance to the wielder, I could see this working for a really dedicated table-top gamer, or someone who’s got a particularly elaborate model train setup.
If a dedicated TTRPGer encountered a vampire in real life, they might need to brandish a d20 at it.
Gamer: Back off vampire, I’ve got a crucifix.
Vampire: That won’t work. I can tell you don’t have faith in it.
Gamer: Okay, how about this… twenty sided die!
Vampire: You rolled a nat 1.
Gamer: Fuck. (Gets eaten.)
Alternate VtM take:
Gamer: Okay, how about this… twenty sided die!
Vampire: I’m a vampire. Only d10s work against me. (Eats gamer)
If you emptied your dice bag in front of him, it would give you time to get away. Wouldn’t it?
Depending on the Ref of course.
Vampire: this is a GURPS game. (chomp)