-Gilt-Leaf Archdruid is an awesome card to have in an Elf deck. Synergizing it with 6 more untapped Druids, like Elvish Archdruid, Arbor Elf, Elvish Mystic and Joraga Treespeaker will grant you access to the lands of your opponents. Also, having one or multiple of these on the battlefield will make you draw cards everytime you play a Druid spell. One drops like Arbor Elf, Elvish Mystic and Joraga Treespeaker will automaticaly renew themselves with a card draw.
-Elvish Archdruid is the overall best modern legal creature you can get in any Elf deck. It is a 2/2 Elf Druid for , grants +1/+1 to all Elves and gives you for every Elf you control. Let's say you have two Forest and an Elvish Archdruid in play, with two Arbor Elf in hand. Playing those Arbor Elf with your Forest won't make you loose mana, because it gives devotion to Elves and Elvish Archdruid will just produce more mana. This means, even thought you could have produced only three mana at the start of this turn, you can still produce three mana at the end of it, making you able to produce a total of five mana instead.
-Arbor Elf is the best Elf Druid one drop producing mana. It helps out ramping mana when combined with enchanted lands like Utopia Sprawl or Overgrowth. Llanowar Elves and Elvish Mystic can sometimes be better than Arbor Elf only because their ability can't be countered (because they are mana abilities). Yet, there are more situations where Arbor Elf is better.
-Joraga Treespeaker is also an amazing Elf Druid to have in this deck. Being simultaneously a one drop Elf Druid that can trigger Gilt-Leaf Archdruid draw ability, add up in Elvish Archdruid devotion and being able to evolve into a Greenweaver Druid for two more mana (and it is a 1/2, not a 1/1). Also, if you ramped up too much mana, you can use eight more mana to grant his ability to all your Elves.
-Elvish Harbinger is another Elf Druid played to give an easy access to either Elvish Archdruid and Gilt-Leaf Archdruid, which are our main components of the deck, or finishers like Joraga Warcaller and Ezuri, Renegade Leader. It is also played for its mana ability. Finally, Elvish Harbinger casted while Gilt-Leaf Archdruid is on the battlefield will make you draw the creature you just searched.
-Ezuri, Renegade Leader is not a Druid, but it is played for its instant speed regeneration and Overrun capacity. Granting +3/+3 trample is a must have finisher in this kind of deck, and a regeneration helps a lot against destroy spells and for blocking in general.
-Joraga Warcaller is also not a Druid, but his multikicker ability can grant incredible power to all Elves you control.
