Board Thread:General Discussion/@comment-25536775-20160313153136

One of the biggest clues that we were going to explore mythology in 5B was when, in 5x07, Merlin was granted permission to drink from the Holy Grail by THE GODS, and after that essentially became the most powerful fully human magic user we've seen, with the possible exception of Emma and the Witches of Oz.

Yet, in 4x15, we saw Poseidon, and he wasn't quite that powerful. In fact, without his Trident he seemed quite weak for a self-described Deity. Of course, we don't know if Poseidon and Hades are the same kind of being, or if Hades and Poseidon were somewhat similar in power level to the ones that granted Merlin his abilities.

Is this just another typical Once power-level inconsistency, or are we missing something? 