Symbol of Demogorgan

This magical item created by Demogorgon to allow the passage of his army, led by the Barlgura recon party...
Creates a portal using the magic from the opening of a portal summoninghis demons..
Also Resistance to fire Fear 10 ' radius Confusion' 10 radius   Casts spells including Blindness and true darkness 100' radius, understand infernal and demon languages, 
Cast hypnotic Gaze on 1 target, and give any instruction that does not cause the target direct harm