Evoker

"Evokers can summon devilish flying beasts, called Vexes, that can pass through walls to swoop at the player. If that wasn’t enough, they have a secondary attack which conjures a row of fangs to erupt from the ground - all part of Jens’ plan to keep the player moving. “I wanted to force players to move around and not just stand with a shield and wait,” Jens says."

- Marsh Davies

Evokers are hostile mobs. They are one of the three types of illagers, which are offshoot villagers – the other two being the illusioner and the vindicator.

Natural generation
Individual evokers spawn during the generation of particular woodland mansion rooms. They will not respawn after their initial spawn, thus there are a limited number of them per world. Evokers spawned with mansions do not naturally despawn.

On Peaceful, evokers do not despawn (in 1.12.2 they despawn when switched to peaceful), but they do not attack the player unless attacked first.

Drops
Evokers will always drop 1 totem of undying. They will also drop 0–1 emeralds if killed by the player, with the maximum increasing by 1 for every level of Looting.

Behavior
Evokers will attack players, villagers and iron golems within 12 blocks.

If the player is within an 8 block radius and the evoker is not in the middle of summoning an attack, the evoker will attempt to run away from the player to avoid being attacked.

The evoker has three different spells: fang attacks, summoning vexes, and a sheep color conversion spell. When attacking, the evoker is much more likely to use a fang attack, and may immediately follow it up by summoning some vexes.

When evokers are ready to attack, they will raise their arms and wave.

Fang attack


The evoker signals this attack by producing light purple smoke and a deep horn-like sound. A number of fangs rise out of the ground, then snap shut and vanish. Non-illager mobs caught in the attack are dealt damage, regardless of armor, enchantments, or difficulty.

Fangs will appear no lower than the feet of the lowest combatant, and no higher than one block above the feet of the highest combatant. Fangs will attempt to appear on the highest opaque block between those two extremes, but will fail to spawn if they are obstructed by a solid block. In practice, this means that fangs will not spawn in deep pits or on top of high walls, but may, for example, go up a staircase if the target is at the top and the evoker at the bottom, or vice versa.

This attack has two forms: offensive and defensive. The offensive form is used if the target is more than three blocks away, the defensive form if they are closer.


 * Offensive Bite


 * The evoker summons 16 fangs in a horizontal line toward the target, spaced a block apart. The fangs are all summoned at once, but with individual delays so that they appear and snap shut in a wave away from the evoker.


 * Defensive Bite


 * The evoker summons a total of 13 fangs in two circles centered on the evoker. The outer circle is made up of 8 fangs and has a radius of three blocks, while the inner circle is made up of 5 fangs and has a radius of two blocks. The inner circle bites slightly before the outer circle.

Summoning fangs resets the evoker's spell cooldown to 5 seconds, and resets the cooldown for summoning fangs to 17 seconds.

Summoning vexes


The evoker signals this attack by producing off-white smoke and a higher-pitched horn-like sound. Between 2 and 4 vexes appear nearby. The evoker will summon vexes even if there are some still left alive from the last summoning.

This spell resets the evoker's spell cooldown to 2 seconds, and resets the cooldown for summoning vexes to 5 seconds.

Sheep color conversion spell
While the evoker is not engaged in combat and  is allowed, it will change the wool color of any blue sheep within 16 blocks to red. It signals the spell by producing orange smoke and making a "wololo" sound.

This spell resets the evoker's spell cooldown to 3 seconds, and resets the cooldown for the sheep conversion spell to 7 seconds.

Data values
Evokers have entity data associated with them that contain various properties of the mob. Their entity ID is.

Evocation Fangs
The individual fangs in an evoker's fang attacks each have a delay. Before the delay is over, the fangs cannot be seen, although unlike truly invisible entities, fangs in warmup still have a visible debug hitbox. After the delay, the fangs expand into existence, snap shut, and shrink out of sight again, dealing magic damage to all creatures standing on the spot. Naturally spawned fangs do not harm illagers, but player-spawned ones do.

Evocation fangs are not affected by Peaceful difficulty.

Data values
Evocation fangs are also entities which have associated entity data. Their entity ID is.

Trivia

 * Minecraft's "Meet the Evoker" shows an Evoker with a hat, which is the similar model of the Illusioner's.
 * This hat model is also seen in the Witch, Nitwit, Librarian, Priest and Vindicator's texture file but unused.
 * The sheep conversion spell is a reference to priests in a video game named "Age of Empires", where they can turn enemy units into friendly units after making a "Wololo" sound.