Pact

A Pact (魔法盟 (パクト), Pakuto; Literally "Oath Signed in Magic"), otherwise known as an Oath (オアス, Oasu) or Pledge (プレーッジ, Purējji) is a Magic Phenomenon witnessed across the world as a means for a to gain an incredible amount of power at a great cost. While many undergo the process of Pact creation unconsciously, such as the process required in the Second Origin Activation, others willingly perform ritual-like ceremonies to achieve the same effect.