Back to Gravity Falls: Beware the Beast (multi-verse crossover)

[Gravity Falls/ParaNorman/Over the Garden Wall/Coraline crossover] It's been years since Mabel and Dipper have been to Gravity Falls. This time, though, the threat is one unafraid of the corpses it leaves in its wake. The gang must prepare for a civil war of godly proportions. ((Romance subplot)) Rated M for disturbing imagery/gore (27/28? Complete)