The new Aurora, Holding Court is an amazing turn 1 play for this deck as she can quest on turn 2 to pay one Ink less to play any Queen or Princess card
You can tap any untapped creature you control, with or without summoning sickness
The early turns can be rough, and if youre on the draw facing down a turn two Steel Leaf Champion you may never get off the ground before you die
Elvish Archdruid A perfect companion to Llanowar Eleves, the Elvish Archdruid is a key reason to play elves, both pumping up all your other elves, and providing a potentially massive mana boast for a game ending play, whether its an overrun or otherwise
Simply bounce all of your opponent's threats while you wait to top-deck something useful
The card is already seeing some play in Pioneer and Standard, and Id be surprised if it doesnt start popping up in lots of token-based Commander decks as a way to beef up your army