Theme:
Elrond quietly builds an army, forging alliances, drawing on the power of his elven-ring, and avoiding direct confrontation with the enemy until the right moment comes, and he reveals himself in a blaze of power.
Mechanics:
a secrecy + Vilya + Outlands deck for one-handed solo play. Quite powerful if you can get Vilya early and build up your board state the first few rounds.
Piloting:
The Grey Wanderer contract lets Elrond start with Light of Valinor [edited to add: actually Strider is the better choice for a starting attachment], which allows him to quest and also use Vilya each round. Obviously you'll want to mulligan for Vilya. Galadriel is there to help find Vilya if that fails.
This deck is all about cheating allies into play. While in secrecy, use Timely Aid to put high-cost allies into play for free. (There are only two copies since the card is dead once your threat goes above 20.) During the early rounds, use The Grey Wanderer Contract for the extra resources; later in the game, this probably won't be necessary. These resources can be spent on cheap Outlands allies. Once a few allies are in play, use A Very Good Tale to summon more.
On a good turn, you should be able to put 3 or even 4 allies into play. Once you've built up your board, you should easily be able to quest for 15+ and attack for 10+. The deck's only weakness is defense. When it comes time to engage enemies, use Outlands allies (which you can recover with Men of the West) and unneeded copies of Imladris Stargazer and Warden of Healing for chump blocking. Jubayr can help with enemies with less than 6 attack.
Looks like fun, I’ll give it a try!