A searing pain assaulted Astaroth at two places simultaneously. His head and his chest.
A feeling of pressure suddenly assaulted his mind, like someone suddenly jammed it into a vise, with someone slowly turning the handle. The pressure on his head constantly mounting was almost making him froth at the mouth already.
As for the pain in his chest, he took it as karmic payback, for every time he melded with a new demon. Solomon's hand was jabbed deep inside his chest, and he could feel the old man taking hold of his soul in his hand like it had actual physical properties.
But no blood was coming from the edges of the wound, and it almost made Astaroth panic, until he remembered they were technically inside a mind-space.
Astaroth had no idea why Solomon was man-handling his soul, but the pain it caused was excruciating.