Walkthroughs for custom maps.

I figured it out myself; it's quite amusing. When the computer has no other option but to attack, and it ends up standing on a Wall of Fire, if there's a weak unit, like a level 1 unit, in front of the wall, it won't attack because it decides it's not worth it. This works even on magic-immune dragons, and it's definitely a bug that has long since become a feature, used by creators of hardcore maps. I know I'm not inventing anything new; I just wanted to share it, in case someone doesn't know.

and this is definitely a bug that has long since become a feature, used by creators of hardcore maps.

Of course, I'm talking about Metatax. In Dandy's Walkthrough, there's a video where he uses the terrain to surround archers (like Titans and Wizards) with single Imps, and then surrounds those Imps with a Wall of Fire. In this scenario, the Black Dragons just stand there, not attacking the wall, while the archers shoot them down. It's a rare trick that I've never seen in my own playthroughs, and I only learned about it by watching Dandy's Walkthrough (which takes a lot from Rose Cavalier's guide, but that's another story).