I want this to be the focus of a save-the-town quest. Everyone is starving, quickly! Find and lug the heavy stone object through the dungeon, across the rickety canyon bridge (WHUMP!), over the lake in the leaky boat (*gurgle*), up the hill, up the hill again, (Damn you Sisyphus!) et cetera. It makes me snigger with evil DM delight.
I quite like this idea because it is highly adaptable. If your game does not focus on Ether a similar setup could be made for any 'aura' of your choosing. What a perfect way to harken the arrival of the BBEG, chimes ringing furiously in a place absent of wind but with a darkening sky. They could also function like Tribbles + Kingons, which is to say if some ethereal/evil has posessed a human or is disguised they still react. They're just a really nice touch that can be added anywhere.
I am not going to vote yet, because this is so close to being a five but is missing one crucial thing to me. Motivation. What is the mission of the circus? Why does this god value laughter? Why does he have a group of laughing assassins? I feel like all of this could be explained if I just knew what the motivation of the cult or their god was.
Another top-notch submission. I love how all of your animals seem pausable and well tailored to their environment. The plot hooks seem a little on the thin side, but I'm still glad they're there. Thanks so much for posting the picture as well, most of your submissions are so clear I don't need one, but this creature is particularly complex looking.
I concur with Infested Jerk. Print it out on a sheet of paper and read it aloud to yourself or better yet have a friend read it to you.
This item does not seem cursed, typically a cursed item has some sort of detrimental effect on the wielder.
Is Damon Lord a person, or do you mean Deamon?
This is a very nice and simple low level complication, with so many ways of it being overcome you don't have to worry too much about whether your players are carrying a grappling hook or not. At higher levels it tends to lose its usefulness when magic-solves-everything kicks in. I think it lacks an added layer of challenge though. I'll post some ideas on the scroll.