The Many Forms of Magic (Part 1)
Beings that cannot exist inhabit a place that cannot be.
Cursed by gods and feared by mortals, these entities fall outside the boundaries of life, death, and undeath.
They are untouchable by even the most powerful deities, though they can be summoned and used by the weakest mortal.
The practitioner of pact magic contacts these alien forces by means of special symbols and rituals.
Once a summoning is complete, he strikes a bargain with the summoned being to gain great supernatural power.
In addition, DMs might find many uses for the strange monsters associated with pact magic, the descriptions of the organizations that either employ it or battle those who do, and the sites for adventures involving this form of magic.