A Sii's physical form is that of a small, pink slug-like creature. In this state, though still possessed of prodigious mental faculties, a Sii is not able to achieve much physically. This limitation is overcome by merging with a host form. The slug-like body of the Sii enters the cranial cavity of its host, and wraps itself around the cerebral cortex. Tendrils are extended and contact points established. Thereafter, the Sii is now able to manipulate its host. As such, the host forms available to a Sii is very much a foundation of the Sii’s powers.
Subjected to the availability of DNA, the formsmiths may be able to engineer new form types. These are considered to be rare or exotic forms, and will be denoted with an asterisk (*) next to their name. Moreover, some forms are made available based on deeds. These will be denoted with a hex (#).
For a quick overview of form capabilities, see: Summary of Forms.
The names of some forms have cropped up through the course of guild activities, but it is unclear if these forms will be available for use by members at any point.