Mana elves
Llanowar Elves & Elvish Mystic provide the first part of our ramp.
Priest of Titania provides insane ramp, in this deck it's basically a non legendary Gaea's Cradle
Elvish Archdruid a costlier priest
Quirion Ranger doubles the mana produced by priest or archdruid, or allows them to be an extra attacker when Craterhoof Behemoth comes down
Tutor Targets
Craterhoof Behemoth is our most common win con, giving whatever elves we have out trample and making them big enough to be lethal.
Terastodon tutoring this on turn 3 massively disrupts the opponent, destroying their land/mana rocks and leaving them with elephants. Very hard for the opponent to come back from that.
Regal Force can provide insane card draw, if for some reason Craterhoof Behemoth isn't needed yet (if there aren't enough untapped elves to attack)
Progenitus protection from everything, plus he reshuffles into the library after a wrath to be searched again
Gaea's Revenge is in to be a combo piece with Craterhoof Behemoth
+
Tooth and Nail
, it also has the benefit to have protection from most instant speed tricks an opponent could have.
how to find our win cons
I'm running a range of tutor spells to maximise my chance of drawing one by turn 3.
Green Sun's Zenith can tutor for another mana elf on turn 2 to ensure we have enough mana to cast what we want on turn 3. And can bring out our big creatures on turn 3 (if tutored this way, i will generally bring out Terastodon to disrupt my opponent)
Natural Order 4 mana to cast any of my win cons and the creature sacrificed is usually the elf i've just tapped for mana in case the target is Craterhoof Behemoth to have the most attackers swinging at my opponent.
Tooth and Nail turn 3 Terastodon and Progenitus? There's not many decks going to find a way to survive that.
Turn 2 progenitus
Turn 1 Forest tap for , Llanowar Elves
turn 2 tap forest and elf for , Quirion Ranger, return forest to hand untap llanowar, use floating to cast Elvish Mystic, Gaea's Cradle tap cradle and llanowar for , Natural Order to find Progenitus
there's no kill like overkill
Turn 1 Forest tap for, Llanowar Elves
turn 2 tap forest and llanowar elves for ,Priest of Titania, Gaea's Cradle tap for , Priest of Titania
turn 3 tap forest anf llanowar elves for ,Dwynen's Elite getting an elf token in the process, there are now 5 elves on the battlefield, tap both priest of titania's and gaea's cradle for , cast Emrakul, the Aeons Torn, win
Now your just being ridiculous
turn 1 Forest tap for , Llanowar Elves
turn 2 Forest tap both lands for , Priest of Titania, tap llanowar elves for , Llanowar Elves
turn 3 tap both lands , Dwynen's Elite, tap priest for , Staff of Domination, tap llnowar elf for , so there's now , untap priest and gain infinite mana/life and draw all your cards.
sideboard
Bane of Progress side in against affinitty, or any other artifact/enchanment heavy deck to wreck their day.