Minecraft wiki entry for Raid, associated text: In Java Edition, when a player with Bad Omen effect enters a 3×3×3 subchunk region around a village center, the effect disappears and the raid starts. A bossbar labeled "Raid" appears and begins charging. The bossbar is visible to players up to 96 blocks away (spherical) from the raid center. The bar is red and represents the total remaining health of the raid mobs. The number of mobs still alive displays when there are fewer than three. A horn sounds at the start of each wave, from the direction of the wave spawn and 13 blocks away from the player. Raid waves try to spawn in the same place, unless a player is too close. A villager rings the bell while the bossbar charges. Each subsequent wave is larger, with more mobs, including pillagers, witches, evokers, ravagers, and vindicators.