Elvish Mystic Llanowar Elves great creatures that can tap to add mana, speeding up gameplay. They are great with combo too, allowing you to draw off beast whisperer and letting you get value with Heritage druid
Nettle Sentinel this creature is the main combo card with Heritage druid, and it can be decent to draw off of beast whisperer with it. In the late game its decent with the elf lords, its effect working like a pseudo vigilance
Heritage Druid the best combo creature in the deck. She combos early to create great advantage and late game she goddess infinite to allow you to play your entire deck on turn 4 with the help of beast whisperer.
Joraga Warcaller an interesting card that is used as a win condition, you ramp up the combo and then drop him in to instantly boost a few elves for lethal. Can also be tossed out as a low cost creature for combo value
Dwynen's Elite originally I overlooked this creature, but with the power of Heritage druid, this card becomes borderline game breaking. She provides 2 bodies for Heritage druid, allowing you to tap them plus her turn 2 to let you get 3 more mana to cast whatever you can (hopefully elvish archdruid).
Elvish Clancaller a great and efficient elf lord that can tutor for extra copies of herself. This creature has a great casting cost, gives you 2 for 1 on devotion with nykthos.
Fauna Shaman an insurance policy. This creature Allows you to trade less valuable non combo cards for whatever combo cards you need.
Elvish Archdruid a great creature that creates a lot of mana. Best played t2, when you can use its effects to end the game early. He's also an elf lord
Beast Whisperer an expensive creature, but it gets you value. With the help of Heritage druid you can draw your whole deck very quickly.