Mold
There is a mold that seems to be alive and it infects people creating elaborate monsters from them. This mold infects an entire apartment complex as the people in the complex try to escape.

1984

2016

1982

2006

1986

1987

2007

2004

1997

1955

1967

2016

2017

2003

2000

2019

1965

1973

1981

1965