Dark Ambition

When you next activate an ability of a Pact this
turn, if that Pact was sacrificed to activate it,
create X 1/1 white and black Cleric creature
tokens, where X is the amount of mana spent to
activate it. If X is 0 or 1, inscribe. (Create a Pact
token. It's an artifact with "{4}, Sacrifice this artifact:
Draw a card. This ability costs {1} less to activate for
each other creature or Pact you've sacrificed this
turn.")