How is people not seeing how good this is. Putting a card back on top of the library is more often than not equivalent to an Extra turn. Opponent spent 5-6 mana to cast something then passed. You sac a three mana creature (reflector mage was named with good reasons) then you Temporal spring a permanent AND get a 5/4 out of the deal......this is sooooo punishing on an opponent who missed a single beat (land drop, didnt play a creature, skipped a turn playing nothing)