Spirit form

The Spirit Form is when a Nephelym from the Void is willing to bind themselves to the Breeder, turning them into a Nephelym.

To unlock the Spirit Form you have to talk to Leylanna, who can be found at the temple of the Goddess in Hedon Township. Leylanna gives you a quest to catch/breed a Foxen or Vulwarg that has the same gender as the Breeder (male, female or futanari), unless this has already been done. After completing the quest and talking to (then having sex with) Leylanna, she rewards you with your Spirit Form (which is a Foxen or Vulwarg as default)

Activating your Spirit Form by pressing 'Q' depletes your Spirit Energy (you have maximum 10 Spirit Energy). You can recharge it to the max by having sex with Leylanna, but having sex with other Blessed Nephelym recharges it by only 5 (spirit does not ever recharge otherwise). You lose all Spirit whenever you succumb to the Endless Daze. You can change your Spirit Form any time by talking to Leylanna, to the species of any Nephelym (even Hybrids) that you bred/caught who has the same gender as your Breeder.

Breeding in your Spirit Form works as if you used an actual Nephelym. (That is, if you are in the form of a Fox, any child you conceive by having sex with a Nephelym of any species has a chance of being either that Nephelym's species, a Fox, or any applicable hybrid. If not in Spirit Form, your children are always the same species as the other parent.  So Spirit Form is very useful if trying to breed a specific race while also gaining XP for your breeder.)

Your Spirit Form is always as tall as the Breeder (Normal 6ft), regardless of the actual normal height of your chosen Nephelym.