Allied spirits, bound spirits, and fetches

[Scorus]

My players have advanced to the point where they will have allied spirits, bound spirits, and a fetch soon. What am I getting wrong or missing here:

Allied Spirits are sent by the deity and accept their charges. They are in mindlink with the player and can perceive and target things through each other's senses. They can use each other’s spells, RP, and MP. They can learn spirit magic spells and sacrifice their own POW for rune spells. They get POW gain rolls, but only succeed on a 01-05.

Bound spirits are forced through magic into a spirit storage crystal or an enchanted item or animal. Assuming there are no restrictions on the enchantment, anyone in contact with the item/animal can communicate with the spirit, use its MPs, or command it to take an action (if in a form where independent action is possible). They can be taught spirit magic, which then can be used by anyone in contact with the item/animal.

A character awakens a fetch as part of the process of becoming a Shaman. They are in mindlink and can perceive through each other, including into the spirit plane. The shaman can use the fetch’s MP and may sacrifice its POW. The shaman can sacrifice POW to increase the fetch’s POW on a 1:1 basis, the only way that its POW can increase. A fetch may learn spirit magic spells. A successful Divine Intervention by the Shaman can fully or partially be paid for out of a Fetch’s POW. A fetch can cast spells into the mundane world but then exposes itself to attack from that world. A fetch can take control of a spirit that it reduces to 0. A shaman may use the fetch’s CHA to learn additional spirit magic. If a fetch dies (0 POW), then the shaman also dies.

[Shiningbrow]

12 hours ago, Scorus said:

A character awakens a fetch as part of the process of becoming a Shaman. They are in mindlink and can perceive through each other, including into the spirit plane. The shaman can use the fetch’s MP and may sacrifice its POW. The shaman can sacrifice POW to increase the fetch’s POW on a 1:1 basis, the only way that its POW can increase. A fetch may learn spirit magic spells. A successful Divine Intervention by the Shaman can fully or partially be paid for out of a Fetch’s POW. A fetch can cast spells into the mundane world but then exposes itself to attack from that world. A fetch can take control of a spirit that it reduces to 0. A shaman may use the fetch’s CHA to learn additional spirit magic. If a fetch dies (0 POW), then the shaman also dies.

This interpretation implies that the Fetch and the shaman are different entities - they're not. The Fetch is the awakened spiritual side of the shaman which is always on the spirit plane (but can manifest on the physical).

The shaman uses 'the Fetch's' MPs because they are the shaman's MP - just an extended amount. Same with the CHA for spell knowledge storage.

Since the shaman and the Fetch are the same entity, the POW used up in a DI is the Shaman's anyway....

12 hours ago, Scorus said:

or command it to take an action (if in a form where independent action is possible).

It can be Commanded to leave the binding to do something, so the form may not matter.