The Justice League, known for its pantheon of heroes guarding the Earth against all forms of evil, has faced myriad threats that span across different genres, including the horror category. Here are the 10 best horror comics starring Justice League heroes:

1.Justice League Dark: The Last Age of Magic – This series introduces us to the darker side of magic in the DC Universe with characters like Zatanna and John Constantine dealing with terrifying magical threats.

2.The Witching Hour – A crossover event that merges Wonder Woman’s storyline with the Justice League Dark team, confronting horrors unleashed by Hecate, the witch-goddess.

3.Blackest Night – This epic crossover deals with death itself as the Black Lantern Corps rise to convert fallen heroes and villains into their ranks, bringing a zombie-like apocalypse into the DC Universe.

4.Swamp Thing: Dark Genesis – Featuring the elemental hero Swamp Thing, this comic explores existential dread through the lens of environmental horror.

5.Justice League: A Midsummer’s Nightmare – Members of the Justice League are trapped in a dream-like realm where their deepest fears become reality, crafted by a villain who can turn nightmares into existence.

6.Batman: The Long Halloween – Although primarily a Batman story, this comic features multiple appearances by Justice League allies and brings Gothic horror elements to Gotham City as a mysterious killer known as Holiday wreaks havoc.

7.I… Vampire! – Andrew Bennett, the vampire anti-hero who sometimes crosses paths with Justice League members, faces a rebellion led by his former lover Mary, Queen of Blood, in this gory and gothic horror tale.

8.Justice League Dark: Rise of the Vampires – This dark narrative pits the JLD against vampires set on conquering both the living world and the afterlife.

9.Superman & Batman vs. Vampires & Werewolves – A fun and frightful romp where Superman and Batman must deal with supernatural creatures disrupting the peace.

10.Hellblazer- Although not always associated directly with the Justice League, John Constantine’s solo ventures into occult mysteries are some of DC’s darkest tales where he sometimes seeks aid from or offers it to members of the Justice League.

These titles wrap traditional superhero excitement within chilling atmospheres and otherworldly threats that delve into genres beyond simple crime-fighting, showcasing how even gods among men can face fear-inducing challenges.