Seraphim

Seraphs are a higher species of angel, above angels such as Castiel and Joshua. Zachariah is an example of a Seraph. They've been around for at least 6 millennia.

Their true form is very intimidating, something like thousands of feet high, with four faces, one of which is a lion, and six gigantic feathered wings.

In the hierarchy of Heaven, the Seraphs, like Zachariah, are ranked higher than cherubs and angels, but lower than archangels.

Powers and Abilities
They posses all Angelic powers. They are but not limited to, as they may not demonstrated yet:


 * Biokinesis: Seraphs manipulate/influence the human body, like can inflict pain down to the molecular level, including internal bleeding, removal of lungs, and hemorrhages.
 * Teleportation: Seraphs, as Angels, can move from to another, instantly; in the blink of an eye.
 * Telepathy: They can easily read the minds of humans.
 * Superhuman Stamina: Seraphs never tire, as one never gave up its search. Obviously, they do not require food, or sleep to function normally, also.
 * Superhuman Durability: Seraphs are extremely durable.
 * Healing: They can heal others of great wounds.
 * Resurrection: They can revive the dead as one of them brought Adam back to life.
 * Immortality - Seraphs like other angels doesn't age. However, as is the case of most celestials, they can be killed.
 * Angelic possession - Like all angels, Seraphs need a human to possess, but because it's angelic possession this needs to be with the human's consent.

Weaknesses

 * Angel blade - As demonstrated when Dean stabs and kills Zachariah.
 * Angel-Banishing Sigil - When activated, such a mark can temporarily banish Seraphs.
 * Common Angelic Weaknesses- They are vulnerable to Holy Oil, Heaven's Weapons, etc.
 * Leviathans- Judging castiel's statement and death's, leviathans can probably kill seraphs.