Cai Cai Filu

Cai Cai Filu aka Cai Cai Vilu

Ancient folklore from Chile’s Mapuche people has a vampiric leviathan called Cai Cai Filu.
This vampire lives at the bottom of the ocean, while in his natural form he’s a tsunami or a tidal wave. He can shape-shift into an ox or horse. (I’ve only been able to find him represented as a snake-like god. Many ancient cultures of Pre-Columbian America had snake-like gods.)

Regular sacrifices are given to this constantly hungry Godlike vampire, to keep him from attacking the village in the form of a tidal wave.
When the Mapuche melted their traditional religion with the Christianity that was brought by missionaries, they reduced Cai Cai Filu from God status to demon. He’s now a consumer of sinners.

Cai Cai Filu’s myth goes deeper than the vampire aspect.(Some don’t speak of the vampire aspect) Cai Cai wanted all earth under his control and so he would cause the water levels to rise. Tren Tren Vilu (or Tren Tren Filu) was a good serpent, who would fight Cai Cai. Tren Tren would raise sea levels until he defeated Cai Cai and the earth was safe.

Are Vampires OCD?

I don’t think a Creature of the Night would have Obsessive Compulsive Disorder, but if you look into ancient legends. .
It would lead to the conclusion that they do.

Old legends say, bury the suspected vampire with mustard seeds in his coffin. When he wakes for his nightly wanderings, he will have to stop and count all the seeds before he can leave his coffin. If you didn’t “remember” to add the seeds inside the coffin, you can scatter them around the top of his grave. He will have to gather them and count them.

Fishing net or knotted ropes/cloths will also work, (same idea, the vampire will have to count each knot).

Seems like OCD behavior to me.