This deck is...mean. It used to be built around powering out big guys but it's evolved into something that may not be able to fight the insane T3/4 combo decks but on any non-competitive table is absolutely nuts. Turn 4 wins are very much possible, turn 6 seems to be the most common benchmark.
So would this deck be something for you? Only if you want to unleash an arms race at your LGS. Or if you have some high rollers who think their awesome Maelstrom Wanderer decks are unbeatable and need to be shown some more power. I'm not sure what can be done to make this deck even faster at this point, but I might have looked over a few things.
See the thing is, not only is the deck fast, it's also consistent and resilient. Typical combo elves decks tend to fold to a wrath + gy exile combo, or a well placed counterspell on their Glimpse. Not this deck. While it uses an elves base, it also makes use of some of the best non-elves around for this particular strategy to work. The result is a green-based combo deck that can win from various angles while being able to plough through some pretty powerful hate.
This consistency is in no small part thanks to it's commander. Selvala, Explorer Returned is often considered to be a grouphuggy card and while true that you give your opponents cards, it's a tiny price to pay for the advantages you gain from it. The lifegain isn't important, but it's still welcomed. The mana however...on average you tap for 3, but mostly you should just hope for 2. That + the card draw ensures you can keep going unless your opponents band together to keep removing her.
Currently, the only weakness this deck sometimes runs into is not having a white source early enough. It's not common, but still a point to consider.
So, that said, here's a list:
So, how does the deck win? Well, there is a variety of combinations available.
Priest of Titania, Selvala, Heart of the Wilds, Elvish Archdruid and Karametra's Acolyte are all highly libable to go infinite with Umbral Mantle/Sword of the Paruns/Sword of Domination. Once that happens, Selvala, Explorer Returned can pull up my deck and from there on I can win the game.
Cloudstone Curio + Thousand-Year Elixir/Concordant Crossroads/Akroma's Memorial is another way in which I can easily go infinite. With the right pieces in play, the deck will draw itself at this point as well.
Aetherflux Reservoir is quite easy to get kills with. At times the deck almost plays storm-like and the combination of high-mana-producing cards allow you to easily cast 15 or so spells in a turn. At that point, you probably win.
There's also the classic Tooth and Nail into Avenger of Zendikar and Craterhoof Behemoth. Funny enough this is a rare win as I often get the T&N before I even have 5 lands, so I usually pick up cards more suitable to the situation on hand at that point.
It's also not uncommon to land the Myojin of Life's Web with a fistful of creatures on hand. This usually leads to a blowout the very next turn, though it's no guarantee.
Finally, the deck has been known to respond to a wrath with Concordant Crossroads, Shaman of Forgotten Ways, Karametra's Acolyte and some other stuff to get enough mana and power on the table and just win out of nothing. The Shaman on its own is very good at putting enemies low enough for just one Avacyn swing or something to kill them, if I'm not using it as a mana booster.
Due to it's various angles of attack, it's hard to anticipate on the deck. Artifact hate is surprisingly strong against it, but at that point you still run afoul of the various creatures just overpowering you. Likewise, creature hate doesn't tend to stay on the board for too long. This doesn't mean it's invincible. As noted above, actually high-end competitive decks are likely to steamroll this list. It can trade punches with them, but will lose out more often than not. So if you choose to rebuild this deck or make your own take on it, make sure your meta is ready for this list without overpowering it, or you won't have a lot of fun with it.