well, this depends, like the fire temple boss is the hardest boss, yet the water temple leaves me confused. And the spirit temple has some of the harder puzzles I have to say, but I found the easiest would be the shadow temple, but not in a bad way, its fun, but I can beat real quick. (although I can beat every temple in under an a hour) I'm gonna have to say the spirit temple even though I sorta cheated with the mini boss by using dins fire instead of the switches. X3