The Oldest Man

The Oldest Man (Aka: Grandest Father) is a tall being, he is the reflection of a shade in the mirror which was brought to the real world by Peter and Lance due to his strange abilities, first of all everyone that tries talking to him will immediately have a heart attack and die while in the mirror world the person will become a living being until they die and return as another person to the real world, he also seems to be invincible, when invincible entities such as Sara or Lance tried talking to him they did not die, he made a dialogue, here is the audio tape Lance recorded:

"So why are you crying?

I was forced to be this, everyone who talks to me dies

Who did that to you?

I don't know, a type of god

Is your body made of your tears?

Yes

* taking notes* alright, we will give you invincible entities to talk to you when you want to

Thank you (End of recording)"

Method of killing
Unknown, heart attacks happen but how they happen is unknown

Containment Procedures
Lance (in beast form) or Sara have to talk to him at least once a week and more if requested

Trivia
The Oldest Man is based on SCP-1440