Devoted Druid

{T}: Add {G}.
Put a -1/-1 counter on Devoted Druid: Untap Devoted Druid.

Elvish Mystic

Jaheira, Friend of the Forest

Tokens you control have "{T}: Add {G}."
Choose a Background (You can have a Background as a second commander.)

Fyndhorn Elves

Heritage Druid

Tap three untapped Elves you control: Add {G}{G}{G}.

Druid of the Cowl

Boreal Druid

Elvish Archdruid

Other Elf creatures you control get +1/+1.
{T}: Add {G} for each Elf you control.

Greenweaver Druid

Gyre Sage

Evolve (Whenever a creature you control enters, if that creature has greater power or toughness than this creature, put a +1/+1 counter on this creature.)
{T}: Add {G} for each +1/+1 counter on Gyre Sage.

A-Canopy Tactician

Other Elves you control get +1/+1.
{T}: Add {G}{G}{G}.

Circle of Dreams Druid

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

Elfhame Druid

{T}: Add {G}.
{T}: Add {G}{G}. Spend this mana only to cast kicked spells.