Dark Pact
From Arkham Horror Wiki
Dark Pact is a special card. It first appeared in The Lurker at the Threshold expansion.
When the Lurker at the Threshold is being used as a herald, investigators may take Dark Pacts. Though an investigator may take multiple Dark Pacts, he can never have more than one of the same type. Possessing a Dark Pact allows an investigator to spend Power tokens. The purposes for which Power tokens can be used are dependent on the type of Dark Pact possessed by the investigator. Dark Pacts provide both benefits and drawbacks unique to their type. Having a Dark Pact can also subject an investigator to particular effects from the Reckoning deck, both for good and ill.