On Killing a Lich

Jefklak's Codex has published an article entitled "On Killing a Lich", in which they take a closer look at the powerful undead creature that shows up in many classic role-playing games. It just wouldn't be a lich article without mentioning Kangaxx, would it?
Perhaps the most well-known Lich there is to date is our dear friend, Kangaxx. He starts out as a "regular" Elemental Lich, previously encountered in Athkatla's gate district (or maybe not yet). In Dungeons & Dragons terms, this means Kangaxx will start out as a powerfull undead spellcaster (yes, level 9 spells) which is completely immunte to spell levels 5 and down - including Breach. That's pretty painful on it's own.

But wait, it gets better. After you managed to beat him, he'll transfer into a demi-lich. Demi-what? Immunity to spell levels 9 and down, immune to all +4 and down weapon enchantments. You will not only be unable to damage the guy, he also has innate abilities to crush your party in seconds using Trap the Soul and Demilich soul. Lean your lesson, reload, and come prepared. Enough Spell Protection scrolls, for instance.