Juvenalian satire due to gentle literacy in words, assertive actions as for Juvenalian satire- bitterness of words and angry is involved in this type of literature.
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The first situation in which he used it to get himself out of a jam was when he was escaping from the cave in which he met smeagol, who we know is intensely aggressive when it comes to the ring. He slipped the ring on and it made him seemingly disappear. Another, much more trivial situation was when he bid everyone farewell at his birthday party basically as a show stopper (but also to avoid the judging eyes and boring personalities of his fellow hobbits).
The ring does not make Bilbo tougher, if anything, it makes him weaker. The power of the ring breaks him down mentally and physically.
I don’t know which specific novel you may be referencing, but generally:
Literary devices can be used to convey theme in many ways. You can use them to convey theme by describing the setting of the story, the mood of the story, the moral of the story, and much more.
You can use foreshadowing to hint at future events important to the story, symbolism to represent important objects relative to the theme, such as a dove in heaven, and you can use a metaphor to assert that one object is another, which brings new meaning to the original subject for a renewed comprehension. These can all improve the conveyance of theme in a story.
These are just a few of the many different literary devices that you can utilize to articulate subjects within a story to add to the understanding or to signify the importance of any detail within the story.”