Artenegelun: A demon of disease, credited with the power to inflict fever, tremors, and weakness upon any target. Artenegelun is named in the Liber de Angelis as part of a spell designed to lash out cruelly at an enemy Serving beneath the infernal king Bilet, when summoned this demon will go forth with his brethren and inflict great suffering and disease upon anyone that the magician targets. The only cure is for the magician to relent and bring an end to the spell.
SOURCE:
The Dictionary of Demons written by Michelle Belanger