Infernal Summoning Circle

Only practiced by the most foul or creatures. Be they human or monster it is this spell that brings forth demons and devils to their sides. It can only be used through sacrifice of some sort, often the life force of the caster. The spell was created deep beneath the earth of Dayeimbe by the by a sect of Drow that were shunned by the larger community due to their insatiable desire to summon creatures of greater and greater power. The sect is believed to be long dead after summoning creatures too powerful for them to control, but that is only rumor after all. -  Joatmoniac