This, is one of the person who called Shaman.
They come from some huge ancient creatures called the Keepers, which are imprisoned in Sarcophagus along with various things in the form of weapons wealth or some other incomprehensible crap that the ancient researchers people left for storage as their nest during their wanderings.

Keepers have a huge variety of species, massive dimensions and their abilities. Some Sarcophagus are opened due to the preserved keys which there are not many left. And those morons who opened the Sarcophagus literally because of not belonging to them automatically call these Titans to battle. And if, by some fortunate coincidence, the moron who somehow can defeat the Keeper, got eternal glory and the dead spirit is transferred to him to preserve the essence and ability of which is revealed only to the child of the winner.

The one who defeats titanium during mating with his soul mate receives incredlbe feelings that he never experienced again, transferring essence during conception to his rudiment, which later forms a tattoo in the body in the silhouette of a fallen Guardian right at birth and will remain forever ..
.. Such persons are called Shamans.

By the way .. Wolf Amazons specialize in recruiting Shamans since this is a powerful force and even more so a rare phenomenon because it is simply impossible to kill the Keeper. And even more so to open the Sarcophagus in which he is sealed.
Since each Keeper is unique inherently, like the forces of Shamans born with tattoos of silhouettes of fallen monsters have unique abilities.