Familiar

Familiars are entities created by Farcri Crowfeather. They resemble miniature versions of certain bosses, and are made to serve players as pets/guardians. Players can have as much familiars as they want, but they can only one 1 type of familiar at a time.

Overview
As of now, there are 10 types of available familiars. All of them have health no less than 300 (but they vary), can be told to stay in place or follow its owner, and require Life Essence to stay loyal to its owner for 10 days. More Life Essences will extend the familiar's duration by 10 more days. If a familiar dies, it respawns back at Farcri's camp after 20 seconds, where they will be untamed again and all used Essences are lost. Familiars do NOT drop any experience or items.

Familiars slowly regenerate health over time, and they will follow their owner only after a considerable distance is between the familiar and its owner. If the familiar cannot reach its owner or it has lagged behind too much, it will teleport to its owner immediately, similar to Wolves.

Right-clicking a familiar will show a menu displaying how much time it has before becoming untamed, its current and maximum health, a button that toggles its wait and follow states, its model, name, and a slot to offer it more Life Essences if needed.

A familiar will attack any hostile mob it sees, and will not stop attacking until its target dies, the familiar dies, or its owner has gotten far enough to make the Familiar follow/teleport to them.

Life Essence
Life Essences are items that are used in conjunction with familiars. If given to an untamed familiar, the said familiar becomes loyal to the player who "fed" it for 10 in-game days. If given more, its duration will extend by 10 for each Essence given. Farcri gives a player a free Life Essence when talked to for the first time to allow the player to choose their first familiar.

Obtaining more Life Essence is a bit tricky. One can buy from Argent some Life Essence at the cost of 6 Purified Vinteum Dust. One can also find random Life Essences hidden randomly throughout the world. Completing the quests It's Now or Nether and Darkness Within Darkness will award 1 or 5 Essences, respectively.

Trivia

 * The only non-boss mob that has a familiar version is the Nazrene.
 * Upcoming updates to Custom NPCs may make the familiars more versatile and dependable upon the addition of the Companion role.