Hi all! So I'm crafting a one-shot around a PC group that is themed around superheroes. Essentially, the PCs will be higher-level and have names like "Captain Fantastic," and "Red Lightning" that kind of stuff.
But of course, every group of super heroes needs some good villains, so I've been experiencing with taking some pretty classic monsters and giving them things you really shouldn't expect them to have, like a Hobgoblin Warlord with invulnerability armor, or my latest creation, an Alhoon with 4 levels of barbarian. My "Dr. Tentaculous" is essentially a Mind Flayer "Batman Bane."
So my question is, when have you taken monsters and given them class levels that people may not expect? Any combinations you think have really put your PCs on their toes? Feel free to add magic items as well.
If your confused about what I'm referring to, the DMG has rules for giving "PC levels" of a class as added levels to a monster's statblock.
(My Mind Flayer Barbarian; he's trained more than his mind!)
Not really class levels as such, but my orcs are built like PCs rather than mobs for that particular campaign.
Means pretty good Str, Con and AC and above average Dex, especially for archers, depending on their Level (the commanders are tougher) Armor up to three quarter plate, Weapon attacks like a PC fighter (A level 10 orc genral gets 3 attacks) Hitdice are like fighters.
I left out few other extra skills that the MM would assign to the different orcs there.
They also form structured disciplined warbands, with archers pikemen and helebardiers fulfilling their roles although they still are CE.
Somehow my orcs resemble more hobgoblins, but I do not use hobgoblins in that campaign.
The main reason I did this, is to present them as an army of Iuz, so I had to chose CE goblinoids eles I would have gone with LE hobgoblins eventually, and the other reason I had for this was to keep them quite challenging even for higher level PCs, especially in numbers.
They operate like a Landsknecht army would, pikemen protecting the archers, and tough helebardiers engaging the party in melee. The pikemen and archers would have backup melee weapons if some PC would come into melee distance.
I never tried crossovers, like your mindflayer barbarian though. I can see it as a little gimmick, but a normal mindflayer with very high intellect should be a fearsome enemy even w/o additional character levels. I cannot see how with 5e the character levels would make him much harder. In 2e that would be adifferent thing but for 5e? Just give it double hitpoints and/or some boost / advantages to saves and/or add legendery resistances or actions, if you want it to be a special challenge.
The problem I see with adding to much extras is action economy. Is it better to suck out a PCs brain or bash it in with the two handed axe? Since it is only one of these two in any given round, but nevertheless both are deadly I do not see the point.
Edit I once had one of the group fighters, a battlemaster fight a 1 on 1 duel with a human fighter champion statted to match him but a different build (Str and heavy armor vs the PCs dex build) . That one was like a PC, had action surge, second wind and so on. He won over the PC by a very narrow margin. But I am not sure if that counts as a monster to you.