The Pillager Bay Minecraft 'link' -

If you enter a village with this effect, a Raid will begin.

If you see a cage, break it open immediately. The Iron Golem will act as a massive tank, drawing aggro and clearing out the Pillagers while you head for the loot. the pillager bay minecraft

The (often colloquially referred to by players as Pillager Bay when found near water) is one of Minecraft’s most atmospheric and challenging early-to-mid-game structures . These jagged, dark-oak towers serve as the staging grounds for Illager scouting parties and are the primary source of the dreaded Bad Omen effect. If you enter a village with this effect, a Raid will begin