Summon Major Kami

A Monster Ability.
From the Book of Engoku:

Materials

Appropriate garb, monster info

Incantation

Caster states “Kami come to me and serve me until thy destruction“ x5

Effects

The caster (or some other willing player) plays as a monster for one life, or until the caster cancels the spell with the following incantation: “Kami begone, you have served me well” x2.

Limitations

Restricted to monsters with a Q/M Ratio of 1:1 or fewer.

Notes

The garb for the monster must meet required standards. The Kami is considered an extra-planar entity in monstrous form, and is affected as an extra planar entity. The Kami can also be sent away with a Dispel Magic. Neither this effect nor banish will cause the player to lose a life. If the Kami is killed, the player loses one life. There is otherwise no summoning cost. The Kami is the same level as the caster.

Currently, the Onmyoji is the only monster with this ability.