I don't recall using Shivering Touch but I'm guessing you're talking about the Shadow Dragon.
[X] Plan Azel
-[X] Standing Order: Block all attacks with Dreamcasting: Wings of Cover if possible
-[X] Dreamcasting: Displacement, keep distance
-[X] Dremcasting: Sonorous Hum, keep distance
-[X] Dreamcasting: Major Image, keep distance and keep the Image merged with yourself
-[X] Dreamcasting: Resilent Sphere on self, play the scared mortal
-[X] Dreamcasting: Greater Invisibility, the Major Image makes it seem that you are still there
-[X] Dreamcasting: Assay Spell Resistance, meanwhile taunt him to unload his Breath Weapon onto the Sphere
-[X] Dreamcasting: Dimension Door, leave the Major Image behind and hide outside of Blindsight range
-[X] Dreamcasting: Spectral Hand
-[X] Dreamcasting: Shivering Touch, deliverd by Spectral Hand
-[X] Repeat Shivering Touch until it drops. Recast Spectral Hand if necessary.
That was the level of high quality cheese required the beat the nightmare dragon. Thankfully it was in the dreamlands so hopefully everyone and their dog isn't going to try that on us if they catch us out