Dervishes, lair 15%
I wrote a dervish lair for the OD&D Discord's one-page lair contest. Though probably intended to evoke some kind of chauvinist caricature of Sudanese Mahdist rebels, dervishes are interesting for being the only Law-aligned humans on the Monsters & Treasure table. They share this cosmic alignment with crucifix-brandishing clerics, so in OD&D's ridiculous implied setting either they're actually pseudo-Catholic or Law embraces a variety of (Abrahamic?) faiths.
In any case, I tried to steer clear of obvious coding after real-world religions and focused on the idea of dervishes as Lawful fanatics living in the desert.