Traps?

[MindWanderer]

The DMG only contains 23 traps (14 Heroic, 5 Paragon, 4 Epic), and I can't find any rules for creating them. Their effects are so disparate that it's really hard to infer creation rules from the few we have. The rolling boulder from Scalegloom isn't even in it! Am I missing something, or are traps basically just not supported except a handful of times per campaign?

 

[Graf]

It's the first round of books. They gave people stuff to start.

The DMG is, honestly, probably going to be a really strong book, but one that's aimed at the "new DM".
And the scaleglooom boulder -should- be in it. Just look at the adventure called "Kobold Hall".