Ghost

The Ghost is a LEGO Halloween Polybag released in 2010. It is largely regarded as the scariest LEGO set ever.

History
The polybag was released in 2010, and was supposedly even banned for being too scary. just2good did a review of the polybag in 2018, and was visibly terrified of it, even outright dropping it in fear.

Meme status
Fans made memes about the polybag on his subreddit, scaring him everytime he saw it. He eventually overcame his fear, but it is still memed even to this day.