The Rite Of Blood and Bone is a dark spell that Twilight used to summon Malice, a demon that could destroy Abaddon. Twilight did have to give up her teeth though. At the end of the spell Malice will appear along with Suzie.
Rite of Blood, and Rite of Bone.
Beseech a heart as cold as stone.
Within this skull, lie forty bones.
To thee, this morbid ward is thrown.
Born of terror, chaos' reign
Dreams a'shatter, all is pain.
Malice slumbers, lucid dreaming
All the nightmare creatures teeming.
Lo and hearken, soul Arcane,
from Nihil, heed us again.
Shall your bonds begin to wane,
I offer you blood, bone, and pain.
Harbinger of violence,
born from no womb but abhorrence.
Tendrils of Malice, seek no more,
to spill our blood upon the floor.
Mother's pain doth birth your form.
Malicious intent bears your storm.
Father's hatred forms your breath.
Fed by the foul teat of death.
Lucicorn of love and light...
Goat of nightmare, hate, and fright.
Bones infused with magic flow,
Offered forth to those below.
I close with forty's weight removed.
The right to end you is behooved.
The final words to crush your throne...
I speak the RITE OF BLOOD AND BONE.