Vindicator

Vindicators are hostile mobs, and one of the two illagers, the other being the evoker.

Through natural generation
Vindicators spawn inside naturally generated woodland mansions in groups of 2–3, alongside evokers and other hostile mobs.

Some rooms in the mansions are forced to spawn 1–2 vindicators.

Drops
Vindicators only drop loot on player kills. They will drop 0–1 emeralds, with the maximum increasing by 1 for every level of Looting. They also have a chance of dropping their axe.

Behavior
Vindicators are hostile towards players and villagers. They will try to attack them, raising their main hand and wielding an iron axe. When in pursuit of their target they will sprint toward them. When not attacking, they don't show the axe in their hand.

If a vindicator is named Johnny or has its  tag set to , it will be hostile to any kind of mob, except for evokers and other vindicators. The tag overrides the name, so you can give a vindicator any other name and set the  tag to   and it will still be hostile in the same way as described. Conversely, you can name the vindicator Johnny and set the  tag to , and the vindicator will not be hostile as described, it will act as a normal vindicator.

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

Trivia

 * The name, "Johnny" is a reference to the 1980 thriller The Shining, where a psychotic man chops through a door with an axe and says the infamous quote, "Here's Johnny!"