You do not age but your host will age at whatever the default aging speed of the host race is. Outside of a host, you will last roughly a week before withering and dying.

Due to their nature of absorbing memories and experiences, the Av'oix are extremely susceptible to emotional changes brought on by the personality of the host with good-natured hosts causing beneficial changes like charitability and friendliness while bad or malicious hosts causing changes like selfishness or lack of empathy. Regardless of where you start, upon taking a host your alignment will shift one space in the direction of your host's alignment, this change is not permanent and can be changed back through work.

A healthy Av'oix will fully expand to its max size of four inches while attached to its host but will retract to one inch once separated. Regardless of if you are fully expanded or not you are considered a tiny creature.

Alone and without a host you have a walking speed of 5 feet and a burrow speed of 5 feet.

You can speak common and one random language of your host. if your host only knows one language then you automatically learn that language for the duration of your time attached. upon separation, you lose the ability to speak that language.

You can telepathically speak to any creature within 30 feet. You do not have to share a language to speak, however, they must be able to speak a language. You can only communicate simple ideas.

The linchpin of your skillset. You may assume control of one host creature of your choice. To successfully assume control of a host you must succeed in a DC18 saving throw or be forcefully expelled from the body, this does not apply to willing hosts, you may make 2 attempts a day before retreating into yourself to recuperate. An unwilling host may make two attempts a day to regain control and expel you from their body by succeeding in a DC16 saving throw. The mind of the host can be either suppressed or allowed to remain conscious but regardless of status, unwilling hosts can still fight to regain control. While in control of the host, you are treated as whatever type the host is with all weaknesses and strengths, however, your base weaknesses will always overpower that of your host (ie: if you are weak to poison and your host is resistant you are still weak to poison). Your level will overall remain the same no matter what level the host was at the time you assume control however the class of the host will remain at whatever level it was before and you must shore up your level by using experience from a previous host class (ie: If your level five fighter host dies and you assume control of a level three monk, you will remain a level three monk with two levels in fighter) this only applies for consecutive hosts. Upon taking a new host you must start at level one and over the course of a week in-game you will regain the levels you lost in transition as you slowly bond with the host and assimilate their knowledge. You can only control medium to small creatures.

being a creature that relies on your host nervous system and brain you are vulnerable to lightning, poison, psychic and thunder damage

Upon failing three death saving throws you may attempt two more throws and if either of them is successful you can remove yourself from your deceased host, this counts toward your 2 attempts a day to control someone.