Zephrys is the card that Blizzard is most proud of in Saviors of Uldum. It is actually a brand-new card type that uses AI not for RNG but to actually help players win games.
If you find yourself in a dire situation, you can cast Zephrys and it will offer you three cards to choose from, which fit your situation the best. For example, imagine your opponent has a full board of minions, then Zephrys will offer you three spells that can clear the board.
This is definitely a very interesting design, and it should see a lot of play.