THREAT: This number ranges from 0 to 7+. It is the number of times the creature can make additional attacks or other actions or force re-rolls.
DEF: Defence is the number subtracted from damage. Always a minimum of 1 point dealt on a hit.
HP: Hit points.
SIZE: Small, gooz, large, giant, and huge. The creatures of this world will lean to the large size. Lots of megafauna. Also, creatures are assumed to be of animal intelligence. Intelligent monsters are not a thing, generally. But you can get some interesting behavior just looking at the animal world.
DMG: How many hit points of damage dealt per attack. Generally based on size, but varies.
Beyond that, I'm avoiding an obligatory description as each will have art. Instead, just going to include some bullet point notes about behavior, special attacks, defenses, etc. I'm also including tables for creating creatures on the fly.