These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
That One Attack: Line Noise adds a turn to the Refresh of your attacks. This includes attacks you haven't used. Many forums like to spam this over and over, making it hard even to hit them. And the only way to stop it is an item sold in a store that, by the time you reach enemies who use this attack, you have no reason to shop at.
That One Boss: Hear 'em Roar is extremely hard to damage unless your class has a lot of Incompetence-based attacks and loves to spam the DVORAK status, which randomizes what you attack with. Without large amounts of Restore Default Script, you'll get nowhere fast.