Trap question

[SDOgre]

Speaking of traps, in the kobold hall DMG adventure how have you been running the boulder trap? Do you ever have it stop moving?

First off I had it roll the other direction. The flavor text says the boulder is coming at you when you walk in but then the arrows show it rolling away from you.

Second, the characters never were dumb enough to stay in its path, but it was a really cool obstacle on the battlefield. They had to account for it or get squished.

I would have attacked every character in its path. But that's because I'm old school...

 

[Boarstorm]

... then the boulder would attack the first person it hits and then ignore everyone else this turn since you only get one opportunity attack per round. (unless of course I'm goofing up my opportunity attacks.)

You are. The key phrase above was "per enemy." For the boulder, anything in its path is an enemy, so it gets one against, say, kobold A, and one against fighter Bob and one against wizard Tim, should it roll over all three in one round.

 

[Ahrimon]

You are. The key phrase above was "per enemy." For the boulder, anything in its path is an enemy, so it gets one against, say, kobold A, and one against fighter Bob and one against wizard Tim, should it roll over all three in one round.

Just found it. An opportunity attack is just one type of opportunity action. I hadn't realized that you can take more than one opportunity action in a round, but they are limited to one per opponent.

I'm starting to get the hang of this...

 

[Jhaelen]

Speaking of traps, in the kobold hall DMG adventure how have you been running the boulder trap? Do you ever have it stop moving?

I had it stop after completing it's path.
I tried to imagine how the trap was constructed, so I was assuming there had to be something to deflect the boulder's path. I assumed those obstacles to have a static orientation.
I guess, more realistically it should have reversed it's direction after circling the central room once at a decreased speed.