It may be hard to remember after 17 pages of vitriol and ad hominem attacks, but the original idea is that the system be easy enough that the 100 are just the "full description" monsters that get a full page of backstory, history, full flavor text, and role in your setting. The candidates are things like orcs and dragons that will be iconic parts of your setting and often used.Koumei wrote:As much as I would personally use a generator (and likely tweak results here and there if it needs to be a bit slower or needs its Ice Web changed to an Acid Web or whatever, assuming the generator doesn't allow for these changes in the first place), there really is something to be said for monsters straight out of the book...
Everything else can just be a notation. An "Ice Spider" only needs a paragraph of flavor text to tell you that its a spider monster from a certain snowy place that tosses icy webs on fools. The rest can be "Vermin 7. Abilities: Poison Bite, Fearsome Jump, Scything Strike, Web of the Ice Spider." The ease of being able to refer to Vermin 7 for the Vermin 7 base stats and abilities cannot be underestimated, especially after people have played for a while and generally remember what they are.
Then you fit 20-30 monsters per page to your last ten or twenty pages. It's not like Fog Giants are really so important to 99% of campaigns that they need a full page.
When you publish adventures, you can do full write-ups on new monsters that are important for that adventure and have backstories that interact with the story or just abbreviate them to their notation if it's a monster with a backstory that's not important to the adventure. A new monster that is just one Wizard's Golem variant that is only guarding a door and will be curbstomped doesn't need a backstory, but a story about an invasion of githyanki red dragon crossbreeds might easily deserve several full write-ups of several variations if you'll be taking down lots of them over the course of the adventure.