This is Oni. His body has been mummified and all of his organs have been removed except for the heart. This is also topped with a heart scarab amulet to be used later.
The goal of this is to preserve his body which his spirit will reunite with.
Before going to the afterlife Oni must pass through the Tuat or underworld.
It looks scary here.
It is guarded by different evil spirits, animals and humanlike creatures with names like he who dances in blood. Apep the serpent god of destruction lurks in the shadows
I am Apep.
This is the book of the dead. Oni wrote here spells prayers and codes that would help her in the underworld.
Oni reaches the hall of Maat which he will face his greatest challenge. He will be tested by 42 Gods and he must say a sin he never committed to all of them.
I have never murdered anyone.
You may pass!
The heart scarab amulet is used here for him to forget the sins he committed.
Oni will weigh his heart, which is weighed down by his sins, against a feather if it is lighter Ra will take Oni to the afterlife, if not Omet will eat Oni's heart and he will cease to exist.
The impact of this now is that people still believe in the afterlife and although we don't believe in all of this stuff about the Gods and underworld we still believe that if we are good while we are alive we will go to the afterlife.