Guileful Diviner

Whenever you cast an instant, sorcery, or
Cleric spell, 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.")
"Yes, I see it all. We are nearing the day... Lord
Grakelkas will return to us."