Huehuecoyotl

Huehuecoyotl was an Aztec trickster deity featured in Supernatural: Coyote's Kiss.

Physical Appearance
Upon his first appearance, he appeared as an old man. He then took on Dean Winchester's form and later shape shifted into a giant coyote, capable of standing on its hind legs.

In the novel
He was summoned by Xochi for guidance on the Borderwalker menace.

He was the one who guided Xochi that all her problems originated back at home. He also told the hunters about the Alpha Borderwalker and her powers. He tricks Dean by telling him that he should ask for a white copal present in a necklace with the Alpha when infact that white copal was the very blood of the Alpha.

Powers and Abilities
His weaknesses were never mentioned.
 * Immortality - As a god, he was not subject to old age or natural death.
 * Invulnerability - He could not be harmed by conventional weapons.
 * Super Strength - He possessed superhuman strength.