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 skill in order to reach the next part. The second test is a test of mind. This test is asking the rangers if they were willing to do the hard work in order to save the world. Finally, there's the test of spirit. Would the rangers fight on, even if they didn't have power to do so? It's a pretty cool (if standard) progression of their quest all things considered.