Guardians of the Hollow

The Guardians of the Hollow are made up of two beings of opposite side. One, being an Angel and one being a Devil both assigned to make sure no one opened the crypt and unleashes the Hollow's all consuming power. When the Source became infuriated due to hearing of his future demise from the Seer he sought after the Hollow, to finally destroy the Charmed Ones and potentially himself. The Hollow is an essence that can possess any living being, good or evil.

Powers
Shimmering.
 * The Devil guardian possesed the Powers of Lightning bolts, Telekinesis, and

Orbing.
 * The Angel Guardian possesed the Powers of Telekinetic Orbing, Hovering, and

Both also probably possesed more powers but those listed were all that were viewed in the show.

Appendicies

 * (Book of Shadows text:)

Guardians of the Hollow

 * Thirty five hundred years ago,
 * The Hollow was unleashed on the world.
 * The Hollow is a force that has the power
 * to consume all magical powers, good or
 * evil and is impossible to destroy.
 * While roaming the earth The Hollow
 * nearly decimated all magic. Good and
 * Evil had to join forces and combine
 * their strongest magic to contain it.
 * It was placed in an ancient crypt and
 * is guarded by a representative from
 * both sides, an Angel and a Devil, for all
 * eternity.