there were fifty men at the signing of the accords in idris : ten of the night children ; ten of lilith 's children , known as warlocks ; ten of the fair folk ; ten of the moon 's children ; and ten of raziel 's blood- tessa jerked awake at the sound of a knock on her door ; she had been half-drowsing on the pillow , her finger still keeping a place in the shadowhunter 's codex .