Specimen 2

Specimen 2 is the first monster to appear in the game Spooky's Jumpscare Mansion. Being introduced in room 60 and having a chance to appear any time after the inital chase. It will actively chase the player, though it's slow speed makes it relatively easy to evade.

Appearance
Specimen 2 is a semi-solid humanoid spectre, it's body made up of a green goo-like substance. This substance can be found in rooms throughout Spooky's home. It only has one hand, which ends in a set of claws. It's only discernable facial feature is a gaping mouth that is always open. The creature's legs are fused together, giving it the ghostly "tail" commonly attributed to spirits.

Abilities
Specimen 2 has the ability to change it's current matter state, allowing it to walk through solid walls as though they weren't there. In addition, the goo that makes up its body can be found in small puddles around the mansion, and will slow any who attempt to walk through it. It is also capable of floating, and uses this ability to move around the mansion.

Trivia

 * Should Specimen 2 kill the player, the words "I know what you have done, and what you have yet to do. But it's alright, because I'm inside you now. We are one but I am many..." will appear on screen for a brief second before the actual game over screen. This could possibly be evidence that the creature is composed of it's many victims, or perhaps the victims of the mansion's thousand rooms.
 * Specimen 2 was inspired by the Lub-Glub monsters from the cartoon Adventure Time.