W'rkncacnter
Hero
uh. no. that passage doesn't say what you say it does. read it again (emphasis mine):Sure it is...
a horde monster represents exactly that - one monster. it is effected by...effects...individually, and takes actions individually, from other horde monsters (though apparently there are rules to pool them together, which is cool, but not what's in the article, so we can't judge that yet). this is stated explicitly later on in the article (emphasis from said article this time):Each round, a horde monster can move and take a single action; it can’t use bonus actions, legendary actions, or damaging traits. Its actions are typically simple and can deal damage only once per round: it doesn’t make several attacks via Multiattack actions or effects that can normally target multiple creatures. When it deals damage, it gains a bonus to its damage roll equal to its Challenge Rating. It doesn’t roll extra weapon dice because it’s larger than Medium.
A horde monster represents one of a big group of tough but unexceptional monsters (rank and file soldiers, beast pack members). It's weaker than a character with a level matching its CR. It's usually found in large groups, often led by an elite monster or one or more standard monsters.