The lowest-level of the yugoloths in Mordenkainen’s Tome of Foes is the merrenoloth, and it’s something I haven’t come across before: a low-level monster that nevertheless has lair actions with regional effects. Merrenoloths normally pilot ferryboats on the River Styx (meaning, I suppose, that Charon is the head of their guild), but they can be summoned and hired to captain vessels on other planes. When a merrenoloth accepts such a contract, the vessel becomes its lair.
The lair actions don’t do much to protect the merrenoloth itself; rather, they protect the vessel under its command, allowing the merrenoloth to restore hit points to a damaged vessel, speed it away from pursuers (or toward another vessel it’s pursuing) or interfere with flying attackers. The merrenoloth itself, in fact, would rather not fight at all—it would rather just do its job. Consequently, it will never come to the aid of another creature. It engages in combat only if threatened directly.
When it is threatened, it defends itself partly by spellcasting and partly by striking with an oversize oar, which it seems to wield as a finesse weapon, judging by its attack bonus and damage. Its ability contour is interesting: part spellslinger, part melee shock attacker. But it doesn’t have much in the way of damaging ranged spells; its strongest offensive gambit is gust of wind, which it can use to try to shove enemies overboard. I say “try to,” because its spell save DC of 13 is not impressive; even low-level fighting classes will beat it at least half the time. On the other hand, it affect an area 60 feet long and 10 feet wide, so it’s usable against several foes at once, at least one of whom is likely to fail their save. (more…)