D&D 5E Artifact to combat Demogorgon

[andargor]

We're playing 3.5e Savage Tide with 5e characters... and the DM uses the 3.5e stats for monsters because we are too strong You have to get creative when you need to hit AC 35... or when there is a save or die

Spoiler: Save or die

like Aren Dagrost's gaze

Anyway, we do not relish fighting 3.5e Demogorgon, but if there is one artifact we would love: something that gives the party the equivalent of Mind Blank, as there is his aura of insanity and other mind-affecting crap with 3.5e save DCs that would seriously gimp the fighters in the group.

Anyhoo, here are his 3.5e stats, good luck : Demogorgon (3.5e Monster) - Dungeons and Dragons Wiki

 

[dave2008]

We're playing 3.5e Savage Tide with 5e characters... and the DM uses the 3.5e stats for monsters because we are too strong You have to get creative when you need to hit AC 35... or when there is a save or die

Spoiler: Save or die

like Aren Dagrost's gaze

Anyway, we do not relish fighting 3.5e Demogorgon, but if there is one artifact we would love: something that gives the party the equivalent of Mind Blank, as there is his aura of insanity and other mind-affecting crap with 3.5e save DCs that would seriously gimp the fighters in the group.

Anyhoo, here are his 3.5e stats, good luck : Demogorgon (3.5e Monster) - Dungeons and Dragons Wiki

Na, have your DM use my Mythic Demogorgon

 

[MarkB]

Something that turned his two heads – left head Aameul and right head Hethradiah – against each other would be apropos.

If you could manage to get a Helm of Reverse Alignment on one of his heads, the results should be pretty spectacular.