These constructs were completely loyal to their masters and remained their faithful companions until death.
Any homunculus could telepathically transmit anything it saw or heard back to its creator. It also knew everything its creator knew, including the ability to understand and read any languages known by its creator. Although they possessed a telepathic link to their masters, homunculi could not verbally speak.
Homunculi were very poor combatants, only being able to utilize a bite with their little mouths. However, they had a small chance to poison their foes. If their foes reacted badly to the poison, they could become unconscious.
As constructed creatures, homunculi did not require food or water to survive. They also did not need to breathe or sleep.
Homunculi were created through a lengthy procedure involving sculpting the construct's body from clay, ash, mandrake root, and spring water. The entire procedure needed to be carried out in a properly equipped alchemist's laboratory. The base component cost for shaping the body was 50 gp, but stronger homunculi could be created by employing finer components at a larger cost. The sculpture was then brought into life by mixing it with 1 pint (470 milliliters) of its creator's blood. The blood needed to be collected through the use of a ceremonial dagger encrusted with jewels worth no less than 1,000 gp. The sculpted body was then brought to life via a 1-hour-long incantation of the create homunculus spell. A spellcaster could only have one homunculus at a time.
This blood created a mystical bond, allowing the creator to see and hear everything the homunculus experienced over great distances, so long as they were on the same plane. However, there was a drawback in that if the construct was slain, the creator suffered damage. It was also possible to transfer some of the homunculus's master's own vitality into the construct, in order to temporarily boost its vitality.
- Mike Mearls, Jeremy Crawford, Christopher Perkins (2014-09-30). Monster Manual 5th edition. Edited by Scott Fitzgerald Gray. (Wizards of the Coast), p. 188. ISBN 978-0786965614.
- Mike Mearls, Stephen Schubert, James Wyatt (June 2008). Monster Manual 4th edition. (Wizards of the Coast), p. 156. ISBN 978-0-7869-4852-9.
- Skip Williams, Jonathan Tweet, Monte Cook (July 2003). Monster Manual v.3.5. (Wizards of the Coast), p. 154. ISBN 0-7869-2893-X.
- Doug Stewart (June 1993). Monstrous Manual. (TSR, Inc), p. 192. ISBN 1-5607-6619-0.
- Gary Gygax (December 1977). Monster Manual, 1st edition. (TSR, Inc), p. 53. ISBN 0-935696-00-8.
- Frank Mentzer (January 1985). “Ay pronunseeAYshun gyd”. In Kim Mohan ed. Dragon #93 (TSR, Inc.), p. 26.
- Jeremy Crawford, Mike Mearls, Robert J. Schwalb, Adam Lee, Christopher Perkins, Matt Sernett (November 2017). Xanathar's Guide to Everything. Edited by Kim Mohan. (Wizards of the Coast), p. 152. ISBN 978-0-7869-6612-7.
- Jeremy Crawford, James Wyatt, Keith Baker (November 2019). Eberron: Rising from the Last War. (Wizards of the Coast), p. 203. ISBN 978-0-7869-6692-9.
- Jeremy Crawford, James Wyatt, Keith Baker (November 2019). Eberron: Rising from the Last War. (Wizards of the Coast), p. 62. ISBN 978-0-7869-6692-9.