Leaf-Crowned Visionary

Other Elves you control get +1/+1.
Whenever you cast an Elf spell, you may pay {G}. If you do, draw a card.

Dwynen's Elite

When Dwynen's Elite enters the battlefield, if you control another Elf, create a 1/1 green Elf Warrior creature token.

{T}: Add {G} for each creature you control.

Other Elves you control get +1/+1.
{4}{G}{G}, {T}: Search your library for a card named Elvish Clancaller, put it onto the battlefield, then shuffle.

Sliver creatures you control have flying.