Packed with 0-cost events that Gandalf can play when on the top of the deck, this deck is designed to maximize the benefits of Council of the Wise. On most rounds, you should be able to choose at least two of the benefits from Council of the Wise, between playing events in hand, those on the top of your deck, and using Galadriel to reduce your threat and put a new card on top of your deck.
Lots of excellent 0-cost event cards are Silvan based, so Celeborn is included to maximize the benefits of these Silvan allies. There are also many doomed cards, which are even more incredible when you can reduce your threat by one immediately after playing them, essentially discounting the doomed keyword.
Mulligan for Nenya or Wizard Pipe. There are lots of good starting hands, but a hand full of lore cards without any way to play them is not one of those.
The White Council is excellent for pulling something out of your discard. Also possible is an infinite recursion engine with Host of Galadhrim, Galadhrim Weaver, and The White Council, playing Host, using the Weaver's response to shuffle The White Council into your deck when your deck is empty, and then using Council to grab Host again. Just don't discard any other cards. Of course, this infinite combo isn't necessary to win, and you shouldn't save either The White Council or Host of Galadhrim if you need them before the endgame.