Well, if it sounds like a legit monster, the fact that a 5yo said it wouldn’t be relevant, and without it being absurd the post kinda loses all substance. It is held up by the implication that this odd exchange actually happened, which it didn’t.

“Imagine if there was a spider dragon with a breath attack of breathing thousands of tiny spiders” just doesn’t have the same hook as this exposition.

There’s too many of these “that happened” posts featuring a child playing a tabletop. They would just be unfunny nonsense if it weren’t framed as something a child actually said.