Sammael

'''"Salt, gathered from the tears of a thousand angels, restraining the essence of Sammael, the Hellhound. The Seed of Destruction. This I can promise, Sammael, for every one of you that falls, two shall arise."

- Grigori Rasputin as he along with Kroenon and Ilsa summons Sammael. "Sammael, die in peace. And then reborn again and again."

- Grigori Rasputin's words about Sammael. '''

Sammael, also sometimes spelled Samael, is a demonic creature that has the ability to multiply upon death and he is a villain in the 2004 film Hellboy.

This bestial demon which is a seemingly-canine, reptillian was brought to life by Rasptuin and his 2 disciples Kroenon and Ilsa through mixing an exhalation of a chaotic spirit with with a strange salt that are the "tears of a thousand angels" repressing the spirit of Samael, thus summoning the beast upon his materialization. It fought against Hellboy who he along his team from the Bureau of Paranormal Research and Defense finally destroyed the rest of this nocturnal, mulitiplying animalistic monstrousity.

Sammael's duality is expressed with the power to doubly reincarnate each time he is killed which earned him the name "Hound of Resurrection". Sammael, aside from his other names and aliases which are "The Desolate One", "The Hellhound", "Lord of the Shadows" (also "Lord of Shadows") and the "Seed of Destruction", was referred to as the "Son of Nergal", meaning he was a child of Nergal who is actually Nergal-Jahad, one of the Ogdru Jahad. The giant Behemoth which appears at the end of the film Hellboy resembles Sadu-Hem, one of the Ogdru Hem who are also offspring of the Ogdru Jahad.

Powers and Abilities
Aside from the obvious superior strength and agility Samael has, he also has incredible regenerative abilities, earning him the name "Hound of Resurrection". He can dislocate his limbs to reach in directions that most other animals cannot. Any broken bones in his body can be regenerated back to the original form. Though not entirely accurate since it is still possible to kill him with enough damage. However that would be a bigger problem than solution since Rasputin cast a spell on him.

Samael will have, at some point laid what looked like an enormous mass of frogspawn. When Samael is killed two of these 'eggs' will break away and rapidly mature until there are twin clones of the monster, which will repeat itself every time one is killed. The only way to kill Samael permanently is to destroy the spawn and kill the full grown ones before they can lay more.

Trivia

 * The monster's name is an alias of Samael, the fallen archangel in Talmudic and post-Talmudic lore, as well as in Judao-Christian tradition and demonology.