Bad Omen

Bad Omen is a status effect that causes a raid to appear if a player is in a village.

Causes
Killing more raid captains while the effect is still ongoing will stack the level up to 6 (VI).

Tip
To avoid raids that kills your precious villagers before you are prepared: Lava bucket doesn't trigger raid if you didn't attack raid captain shortly (about 5 seconds) before his death. Don't have dogs, they count as player attacks. Having a milk bucket allows to lure them out of the village boundaries and get rid of bad omen effect before entering again.

Immune mobs
No mobs are immune from the effect; however, only players can trigger raids.

History
Mau presságio 不祥之兆