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.
Demonic Spider: Just about any enemy with a level even remotely close to yours can really tear chunks out of your lifebar. Enemies that have orange or red level numbers (which indicate their threat to you) can kill you in one or two hits. And they often come in large packs.
Game Breaker: The special attack of the Spinning Tomahawk weapons. DeathSpank becomes a controllable tornado of spinning death, capable of clearing entire groups. It's also useful on big enemies and bosses, but they can usually still hit you. Simply master the perfect block to charge it up and you can really dispense the justice.