Patrol

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

Spawning
Illager patrols spawn as a group of a maximum of five pillagers (weight 55) or vindicators (weight 27), one of which is the patrol captain.

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.

The patrol captain will wear an illager banner on their head.

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 has no consequences until the player enters a village. Then the effect is removed from the player and a raid spawns nearby after about 5 seconds.