Some time ago, a reader asked me to take a look at the alhoon, an undead, spellcasting mind flayer that’s almost a lich but not quite. Instead of becoming effectively immortal, the alhoon lengthens its lifespan through human(oid) sacrifice, tacking on however many years its victim has lived. (It seems to me that the alhoon should get however many years the victim has left, but whatever; I’m not a necromancer.)
Alhoons have a daunting array of features, so strap in—this is going to take a while to analyze. We’ll begin with their ability scores, which, like those of the ordinary mind flayer, are weighted toward the mental end, with Intelligence 19 leading the pack. However, unlike ordinary mind flayers, they also have a very high Constitution, along with proficiency in Constitution saving throws. This, combined with immunity (not resistance!) to physical damage from nonmagical attacks and advantage on saving throws against spells from Magic Resistance means their chief vulnerability is to magic weapons, with spells that require Dexterity saves to avoid damage a distant second. And not just any Dex-save spell: they’re also resistant to cold, lightning and necrotic damage and immune to poison. Fireball OK; lightning bolt bad.
In addition to various intellectual skills, alhoons have proficiency in Perception and Stealth, disposing them toward ambush. Their 120 feet of truesight means they probably know when you’re coming for them, and the first thing an alhoon does when it knows you’re coming is Hide. (more…)