After finding a new host or transforming after death, the player is forced to play as a mob. Possessor players behave very similarly to their mobs, meaning they have both their strengths and weaknesses. For instance, the player’s inventory size may vary depending on the possessed mob and undead mobs have a slightly better vision in the dark.
Additionally, any passive behaviour from the possessed mob will be preserved, for example
Even while possessing other mobs, some aggressive mobs might become suspicious of you and attack you if you move too close.
This Mechanic can be configured using gamerules.
Trying to possess Endermen without removing their soul first will make them teleport, dragging the player with them.
Possessed mobs also do not receive any experience from combat and won’t be able to obtain rare drops like Spider Eyes or Blaze Rods. To bypass that problem, Humanity I books can be found in Nether Fortresses and upgraded to Humanity II by a Mortician.
Humanity I-enchanted swords allow players to get the rarer drops,
Humanity II allows for the usual experience gain.
Some mobs do have a hunger bar when possessed, letting them regenerate more easily, but have some eating restrictions.
Depending on the undead possessed, the player may be able to use items differently from how they would if they were human. To ensure a balanced game, these item uses have varying cooldowns.
Raw meat can be eaten by Zombie players (all sub-types included) to regenerate health. A piece of meat regenerates as much health as it would recover food for a human player.
Raw fish can be eaten by Drowned exclusively, and serves the same purpose raw meat does.
Skeletons (all sub-types included) can replace their damaged bones by new ones. To do so, just use a bone and it will regenerate 4 health points (2 hearts).
If Wither Skeletons use this practice, they will slowly turn into regular Skeletons and have a 1/5 chance on leaving their head to the player when doing so. The amount of bones needed for this conversion depends on the difficulty.
Skeletons (all sub-types included) can drink milk for extra bone resistance. Drinking a milk bucket grants the player Resistance for 30 seconds.
Using a bow as a Skeleton (all sub-types included) has a chance to not consume an arrow when shooting. This ability only applies to regular arrows. Resulting arrows are not recoverable.
Using a crossbow as a piglin or a pillager has a chance to not consume ammunition when shooting. This ability applies to all kinds of crossbow ammunition, but with a lower chance than that of Skeletal Efficiency. Resulting arrows are not recoverable.
Throwing a trident as a Drowned has a chance to keep it in hand and duplicate it. Resulting tridents are not recoverable.
Witches can brew potions on the fly by holding a water bottle. The resulting potion, produced automatically in dangerous situations, depends on the apparent danger.
Foxes can eat berries to regain some health.
This ability, not being assigned to any entity by default, completely removes the need for ammunition.
This variant of the Totem of Undying will revive you as a Skeleton once you die. It must be held just like the Totem of Undying and works independent of hosts.
The Totem of Skeletonization is currently unobtainable.