I wanted to make an elf combo without having to go two colors, and spend a fortune on dual lands and such. With incorporating Umbral Mantle, I am able to get an infinite mana combo with Priest of Titania, or Elvish Archdruid, while at the same time pumping him with +2/2 counters. With Glimpse of Nature, and the low casting cost elves, I am able to draw and play until most of the deck is gone, then drop the Ezuri, Renegade Leader, pumping all my creatures and giving them trample, then all I have to do is attack with my one Priest or Archdruid, this is done often on turn 3, consistently! Generally, you want to start you hand with a:
1 drop Llanowar Elves
2nd turn Priest of Titania or Elvish Archdruid
3rd turn seems to always go off with the combination of Quirion Ranger, untapping your mana producers and either Searching with your Green Sun's Zenith for the Regal Force to draw more cards to get Umbral Mantle and finishing them off by dropping the Ezuri, Renegade Leader.
There are more ways of kick starting your combo if you don't have the cards right away, this can be done by dropping and picking up your Elvish Visionary using Wirewood Symbiote to draw the cards you need.
This is my version of a winning Legacy deck, but I honestly think mine is better, it seems to go off much quicker than the popular white/green elves combo deck floating around... This deck could be considered a totally different deck.
Tell me what you think!