A good example of adapting existing material to suit your purposes when making custom monsters.
Plot Basics for Dungeon Masters: Complications and Obstacles
Where do I start? That’s a question I’ve seen many new Dungeon Masters asking when making their own campaigns. How do you push the party to action? How do you…
Super-Objective, Objective, and Conflict
Organizing Your Campaign Notes Effectively as a Dungeon Master for Fifth Edition Dungeons and Dragons
My Method for Creating Cities as a Dungeon Master for Fifth Edition Dungeons and Dragons
Here’s another homebrewed villain character I’ve used in the past.
This is a villain I put together for a low level party (level 1-2).