Minecraft wiki entry for Defeating_a_village_raid, associated text: Raids are events during which pillagers, vindicators, ravagers, and evokers (which can summon vexes) invade a village to kill as many villagers as possible (witches also spawn but they are passive to villagers, they also attack iron golems and the player and heal other illagers with beneficial potions). They can be difficult to tackle early-game and can result in many villager deaths if not properly handled.