With the froghemoth, we witness another one of the authors’ odd classification decisions: the flavor text describes froghemoths as “creatures not of this world,” who first emerged from “strange, cylindrical chambers of metal buried in the ground,” but they’re categorized as monstrosities, not as aberrations. Then again, it may not matter much, since even aberrations behave as evolved creatures—they’ve simply evolved in conditions too alien for humanoids to comprehend. And monstrosities should always behave as evolved creatures unless there’s some specific reason to think they shouldn’t, such as being created through some kind of fiendish curse.
Pure brutes, froghemoths nevertheless have proficiency in Stealth, indicating that they’re ambush predators. If at all possible, they hide underwater and strike with surprise. Once they’ve attacked, however, they overwhelm their opponents with their extraordinary Strength and Constitution.
I notice two details tucked into the top half of their stat block. The first is that they have proficiency in Constitution and Wisdom saving throws—two of the big three—but not in the third, Dexterity, and their Dexterity is above-average but far from extraordinary. In general, therefore, they’re not afraid of spellcasters per se. But a spellcaster slinging damaging Dex-save spells will annoy them greatly, and in particular (this is the second detail), lightning bolt or any other spell dealing lightning damage will alarm and enrage them. (more…)