Patrol

Illager patrols are common naturally spawning groups of pillagers and vindicators that attack villages.

Spawning
Illager patrols spawn as a group of pillagers and vindicators, totaling five all together. One of the pillagers is the patrol captain/leader. The patrol captain wears a pillager banner on its head.

Illager patrols spawn 200 blocks away from villages in plains, taiga, desert and savanna biomes, as well as their variants, on sand and grass blocks with a block light level of 0–8 and a sky light level of 10–15. Illager patrols spawn naturally throughout the day or night after 5 in-game days.

Behavior
Illager patrols will circle inwards to villages and then proceed to attack the village and try to kill villagers and iron golems.

The patrol captain always drops an illager banner upon death.

Bad Omen
Upon killing a patrol captain, the player receives 1 to 3 levels of the effect, which stays permanently and does nothing until the player enters a village. Then the effect is removed from the player and a raid spawns nearby after about 5 seconds.