Of course, it all depends on which decks youre facing and the life and resources at your disposal
Arwen Undmiel Celeborn the Wise Chance-Met Elves Council's Deliberation Elminster Elrond, Master of Healing Elvish Mariner Flamespeaker Adept Galadriel of Lothlrien Glorfindel, Dauntless Rescuer Knowledge and Power Legolas, Counter of Kills Lost Isle Calling Matoya, Archon Elder Nimrodel Watcher Planetarium of Wan Shi Tong Search Elemental (playtest)
For some more info on tests and such, see the post Spotting fakes part II
Powerful Card Draw in Various Formats Treasure Cruise In formats like Legacy and Modern, the delve mechanic of Treasure Cruise allows you to essentially turn your graveyard into a resource, making this card a powerhouse for drawing three cards with minimal mana investment
Go wild with your highest-power cards
Phelddagrif was good times, and was brought back again as the also surprisingly worthwhile Questing Phelddagrif