The Forty Servants
This particular Oracle deck actually serves two functions. As a Divination tool, this deck provides guidance from 40 various Archetypes or 'Servants', much in the way that an Angel Oracle Deck would give you guidance from the Angels depicted. But it also functions as a Magical system that can a standalone fixture of Chaos Magic, or integrated into your own Magical Practice- either way, you can actively call upon the Servitors to act on your behalf.
While I do personally utilize The Forty Servants in both capacities, I only offer their guidance through their Divinatory modality here. I feel that as representations of the energies that exist around us [from the profound and ancient to the newly-formed and transformative], they are perfect, accessible forces to call upon for figuring out the next best course of action, or whose energy to call upon for strength.