The Curse of the Cave Creatures is the 5th Special Edition book in the Give Yourself Goosebumps series.
Plot[]
Whilst visiting your cousins in Arizona you go exploring in a cave, find an animal skull, and drop it. Suddenly, a Shaman appears and says that you have displeased the Cave Spirit; for which you are to be turned into a petroglyph on the cavern wall. Your only hope of avoiding this fate is to become a "worthy opponent" to the Cave Spirit and defeat him in a fair fight. From here, you have a choice of turning into either a hunter or spell caster, and have to pick from a list of items to use. Like the books in the main series, this one has two storylines.
Story A[]
You choose to become a hunter, and pick three out of four magical weapons to use in addition to a sword that the Shaman gives you. The Cave Spirit will appear to you as an animal, meaning that all animals (including pictures and anything at all that could have an animal on it) are dangerous to you. You then try to survive as the Cave Spirit takes the form of different animals to attack you.
Story B[]
You choose to become a spell caster and are given a wand, then have to choose from three of four talismans which can cast spells for you. However, these spells may backfire, and when using the wand you have to be very careful how you phrase your words.