He appears to resemble Undying except that he now has a mouth, with short, sharp teeth. He also has big hands with long fingers. He also has a long, thick, sinister looking tongue.
Impure Undying first starts in Pirates Cavern Floor 2 and has a rare chance of replacing Undying. To avoid him, you do the same to his normal counterpart. He also appears on night 4, having a rare chance of replacing Undying. He will start at Meat Freezer, have to be watched or he will go into the office, and is fended off by the power like his normal counterpart.
Impure Undying first starts in Pirates Cavern Floor 2. On night 4, he starts in the Meat Freezer and the Office.
- He could be the same Undying, but turned Impure which explains why he has a rare chance of replacing him.
- He's the only impure so far to not have human teeth.
- Originally, he was gonna have red tentacles coming out of his bad, but was scrapped due to looking too similar to Slenderman