When you walk into a village with the Bad Omen effect, a raid will appear, and there will be a boss bar for the raid. Then, if you spawn a snow golem then ring the bell, only ravagers and pillagers will freeze in place, and then despawn. The rest of the villagers will then do weird behavior. Vindicators will start to spin around ant won't attack, and evokers will move without walking animation.

• This is very strange, as it happened multiple times. Interestingly, if you spawn an iron golem and then ring the bell, nothing will happen.