Allen's Pact has been with the Nyx the Shadow Arcana
Nyx is made from the sorrow, depression, and apathy of humankind, believing that humans were tired of living and thus, her duty to end their lives. She listens and hears the heart of humanity and grants they're true desire....Death
By forming this pact Allen has been given the power to look into a person's heart and see there true desires as well as the power of the Shadow Arcana. Allen can now live 12 lives at a time one for each Arcana threw motions called Arcana shifts. Any that has happened to Allen before an Arcana shift would be altered and then improved apon. It has also given him the power to control the army of shadows Nyx's underlings and servants. These Shadows come in many different shapes and sizes some are even smarter then others. Some look like hored monsters others look as if they're human.
Allen's Price for this pact with the Shadow Arcana is the feeling of regret. Allen will no longer feel sorrow toward anyone of anything, And it's because of this Allen will become a puppet to the Arcana force to live by his contract with out a choice.
(Nyx)