Board Thread:General Discussion/@comment-25000380-20150322235412/@comment-25435121-20150323221620

The only time it has an effect is like in The Four Guardians event where each area has a different AW. The Witch Gate will only have the AW from the event that is in the map area you found the Witch Gate. For example, with White Tiger was available only in areas 1-1 through 1-4, so if you found a Witch Gate in 1-4 the only AW you'd find is past event, or White Tiger. The Witch Gate found in 1-4 would never have a Black Tortoise, Azure Dragon, or Vermilion Bird.

For the completion rewards, you do not even need to fight the enemy to get the card. For example, I received a single Oracle Ascendant as a completion reward, but I did not fight a single Oracle Ascendant during that Witch Gate.