The Blob was one of the monsters captured by the Facility and was used to kill people to appease the Elder Gods' blood lust. It is unknown what would summon it. The Blob was depicted as a gelatinous creature made of tissue and organs that is somehow sentient. During the System Purge the Blob is seen suffocating a man and slowly pulling him down into a sink. It is one of the few monsters to probally survive the Elder Gods awakening.