Materials: Stilograph and paper.
The Serpent: The serpent symbolizes the evil inherent in the earthly. The sin.
The Skull: It represents the liberation of the soul, the transition from the earthly to the spiritual.
The Eagle: It represents the divinity that comes for the light, freeing the soul from its dark envelope (physical body) and bringing it to the surface.
In universal iconography the eagle and the serpent always appear in struggle. Certain authors justify this symbolic conjunction by claiming that both animals are complementary, rather than opposed, since one represents the celestial principle (of Heaven), and the other the ctonic principle (of Earth).