They say (but you know the sort of thing They say) that the much reviled sorcerer of the lower Nile, Amen-Ekot boasted that he could never be truly slain by his many enemies because he had entrusted his vital essence to a safer place than "any vault of all too perishable carrion meat" as he charmingly referred to his own body.
His enemies decided that they'd take the risk and slew him, cutting his perishable carrion meat into exactly forty one pieces, each one of which was burned seperately.
None of them were happy to hear reports of his reappearance less than a month later.
It transpired that the fellow had found a way to paint his likeness, or his symbolic likeness at any rate (since in reality he did not have the head of a blasphemously disfigured ibis) into the hieroglyphs and frescoes of a local shrine. They beady eye of that foul painting could captivate the viewer and by an act of will (that will being often overborne by the sorcerer's dread intent) could draw the painted essence of the sorcerer forth again as whole as he was (and bearing the memories up to the point) when the image was created.
They say (but you know the sort of thing They say) that the Gate works both ways as Gates are wont to do and that if he had chosen, Amen-Ekot could instead draw in a hapless viewer whose symbolic image would appear alongside that of the cruel magician and in that strange nether-realm of which the painted frescoes were but a representation, he could interrogate or consume his captive.
It is to be hoped that all the representations of Amen-Ekot were destroyed in the weeks and months after that first dreadful resurrection. It is to be hoped that his writings were all destroyed and that no remnant exists of the instructions for this damned ritual.
On an unrelated* note I've always liked this video from A-Ha, even though the song itself is the usual banal nonsense.
* Not Really.