Talk:Draconis/@comment-2003:C0:2F22:4909:80B9:FDBF:8A14:5D17-20190510105841/@comment-81.53.48.249-20200215143334

While he is immune to the Slay effect (e.g. Finger of Death), he is vulnerable to Confusion, Feeblemindedness, Imprisonment, Blindness, Deafness, Level drain, Time stop, Intelligence drain, Power word Kill, Maze, Disease. He has no resistance to magic damage, his breath does pure acid damage, and he has 225 HP. His breath, like all dragon breaths, also has a trick to resisting it beyond being aware of its effects.

Knowing all of this, you can solo him in a fair fight with any variant of arcane spellcaster in "insane" difficulty.