The bomblet we got from the shrine didn't quite work as a power source - we're back to square one, but still have some leads.
Unlike normal walkthroughs, in Nice Game Hints you can select just the puzzle you want hints for. Here are listed the puzzles for "Part 4 - After trying the new power source" in Primordia. The guide you choose only contains information about that puzzle, reducing possible spoilers for other puzzles.