trials of gravity let me introduce you the deck i've used for this trials #1 against the arena, the history of the armagio.
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it's not a very fast deck but it's pretty solid cause of defence of armagio (if needed) and a very high damage potential trough your overdrives.
precog is a lovely card in this deck cause you can base your stragety on it, look what your opponent has and plan on that.
rewinds can help with it, use precog first and then decide to use rewind on his biggest threat (sometimes you gotta wait with using it).
the chimera is a nice addition, it saved my life a couple of times late game and can act as a great late game finisher.
i'll upload my screenshots of beating the arena once i have them all.