The 3 trials to get to the Tribunal of Magic are actually the 3 trials that just about any fantasy hero would end up doing. The first trial is fighting against enemies. This is a trial of body- testing their physical skill in order to reach the next part. The second test is a test of mind- asking the Rangers if they were willing to do the hard work in order to save the world, rather then taking the easy way out. Finally, there's the test of spirit- would the Rangers fight on to help the world and make it better, even if they didn't have their powers? It's a pretty cool (if standard) progression of their quest all things considered.