[quote=@Kuro]
<Snipped quote by Chiro>

I suppose that could work, though I would need more information on the powers the Guardian would have, and what kind of offering would be needed.
[/quote]

Let's see...

I'll put what ideas I had regarding the pact, which can be taken or left depending on situation.

Forming a pact: Master of the House (Owner of a building or in this case a high ranking member of an organization) offers the coming guardian a magically weaved piece of clothing (usually a red cap) to wear, which the Guardian accepts. During the forming the duties and offerings are decided.

Ending the pact: The Pact is considered null and void if Household Guardian receives clothing that is specifically given to him (Guardian can use discarded clothes or make them himself)

Offering: A series of demands for which in exchange the Household Guardian works. There's a wide variety of different offerings, but the following two are the most common.
- Guardian will receive special meals. This can for example be the first serving of a dinner in the mess hall
- Guardian can choose a specific place for himself to rest, where he is not to be disturbed

If offerings aren't maintained, the Household Guardian is not required to work. Some Guardians are known to get aggressive if displeased too much.

Possible tasks:
- Cleaning the house
- Mending clothes
- Maintaining the building
- Carrying loads
- Taking care of the animals
- Taking care of the crops
- Protecting the household, whether from intruders, curses or bad luck
- Maintaining discipline

Household Guardians can also protect the lands. There is a known case where a nobleman, who was proud of the fish available in his lake, made a Household Pact with a Kelpie, so that the latter would keep the fish plentiful and get rid off anyone who tried to fish in the lake without nobleman's permission.

Possible powers granted by the Pact:
- Invisibility (to do work unseen and to protect the household)
- Strength (to carry heavy loads), alternatively telekinesis
- Speed (to do tasks quickly)
- Luck Magic (for protection)
- Animal empathy (for livestock care)
- Danger sense (for protection)
- Plant empathy (for plant care)