You can find the Bowl of Revelations as follows:

• Pilgrim’s Perch: Take the ladder down that leads to a fight with a Womb of Despair and various Remnants. Circle the stone pillar to the right to find the Lucky Paw. You may also notice another item on the piece of cloth, which if hit with a throwable object, will drop onto the ground, allowing you to obtain another Lucky Paw. Soulflay an Umbral Belly then it will drop the “Bowl of Revelations” along with two “Umbral Scouring”.