This part of the site is dedicated to generating variants of adversaries from level 1 to level 20.

I don't believe in "one level" mobs/monsters. Every creature should be scalable for use at any level. For example, in the D&D universe, a Zombie has a CR rating of 1/4. That means a zombie has a very limited lifespan in a player character's career. Once a character gets to level 2 and beyond, Zombies can no longer be used because they are too easy. That's rubbish. I believe zombies can be interesting at any character level.

Please check back in a few days time. I'm working on an automatic leveling system that will generate stats for monsters from level 1 to level 20, and will be free to use.