You're able to know all of the world history that was lost over time (burned away in books, thrown out unintentionally). You're predicting the past futures of writers and people no one have heard of before, but now they do. And slowly, you're re-writing history, bit by bit, which can ultimately change a bit of the future.
Crappy power: When you sneeze, you attract animals. The type of animal changes each time. And the amount of sneezes and the size determines how many come your way.