Minecraft wiki entry for Pillager, associated text: Each patrol spawns one pillager captain, while outposts can continually spawn pillager captains, each captain will inflict the player who killed them with one level of Bad Omen upon death. Raid captains do not inflict Bad Omen when defeated in a raid. In Java Edition, killing multiple captains in succession raises the Bad Omen level to a maximum of V, increasing the chance of pillagers and vindicators in the resulting raid wielding enchanted weapons. As long as the Bad Omen level is higher than I, the resulting raid includes an additional wave with a raider composition identical to that of the last wave.