You can spend 10 minutes to perform a ritual to create a companion known as a homunculus. At the end of the ritual, the homunculus appears in an unoccupied space that you can see within 10 meters and assumes the form of a homunculus companion form.

Subtract an amount of catalysts or mana equal to your catalyst limit or Aptitude Bonus, or an amount of ki equal to double your Aptitude Bonus each time you take a rest. The homunculus is augmented to that amount of catalysts or mana. The homunculus is friendly to you and your companions and you always call the same homunculus.

Any creature you animated with this spell acts after your turn. You can mentally command the creature if it is within 20 meters of you (if you control multiple creatures, you can command any or all of them at the same time, issuing the same command to each one). The creature(s) will generally follow any specific verbal commands that you issue to them if the likely outcome is in accordance with its desires (no action required by you). For example you may command it to guard a particular chamber or corridor, explore the room ahead, or to attack a specific creature. If you don't issue any commands, they defend themselves from hostile creatures, but otherwise take no actions.

If the homunculus is ever slain, the magical bond you share allows you to return it to life. With 8 hours of work and the expenditure of rare materials worth 10 sp for each catalyst limit or Aptitude Bonus, you call forth the homunculus’s spirit and use your magic to create a new body for it. You can return a homunculus to life in this manner even if you do not possess any part of its body.