"Edge lords" are those that for whatever reason like to make uncomfortable contraversial remarks .. not for the genuine sake of discussing things that should be discussed in a measured way but for the goal of provoking drama, over reaction, chaos, confusion and distraction.

The appearence of multiple relatively new users all pushing extreme takes that are on the edge or well over gets shorthanded as an edge lord raid - it's coordinated and can have multiple root causes from simple social drama to actual distraction with an ulterior motive (eg: prompting moderators into rushed counter reaction can expose passwords | permissions | inter operator side channel communications, etc).

Slow trolls like the drama but dislike the boot .. they'll wheedle their way into communities and build a support network then pivot into being "that uncle at thanksgiving" .. you know the one.

These are very rough descriptions, it's very much the case that you might not be able to pin particular behavious down but you'll know 'em when you see 'em.