Moar duergar! The duergar mind master is the last of the CR 2 duergar, the one with the ability contour of a spellcaster but no actual spells. What it does have is Mind Mastery, a feature with a 60-foot range which requires an Intelligence saving throw to resist. More to the point, it targets one creature within 60 feet and requires a DC 12 Intelligence save to resist.
This feature, frankly, is terrible. Even a level 1 PC who’s dumped Intelligence still has a 40 percent chance of succeeding on this saving throw. It’s a straight-up waste of an action in any circumstance save one: as part of an ambush. In this instance, a hidden mind master can use Mind Mastery against a target without giving away its position or even its presence if it fails, since Mind Mastery is technically neither an attack nor a spell. If it succeeds, it gets to force an opponent to sucker-punch one of their own allies—or, depending on the local terrain, walk directly into a chasm or a river of lava or something. With Intelligence 15, a mind master is smart enough to know not to bother using this feature in open combat.
So forget treating it as a spellcaster; we’ll pretend that its Intelligence is nothing special after all and it’s just another shock trooper, using Dexterity for offense as well as defense. Continue reading Duergar Tactics: Mordenkainen’s Duergar, Part 2