Horn of Gabriel - ANGEL SIGIL MAGICK

 Brief Information on Angel Sigil Magick

The Horn of Gabriel - "Gabriel's Horn is revealed to be a type of spell, that when the sigil is activated will draw any angels within earshot of it to it. The only known ingredients that were revealed for it were: blood, griffin feathers and the bones of a fairy (no specific realm is necessary)."

Note - If you are interested in in Angel Magick check out 

The 72 Angels of Magick: Instant Access to the Angels of Power by Damon Brand

The 72 Angels of Magick: Instant Access to the Angels of Power (The Gallery of Magick): Brand, Damon: 9781530016624: Amazon.com: Books

I would highly recommend this book.