Copperhorn Scout

Whenever Copperhorn Scout attacks, untap each other creature you control.

Elvish Mystic

Fyndhorn Elves

Llanowar Elves

Arbor Elf

Wild Growth

Enchant land
Whenever enchanted land is tapped for mana, its controller adds an additional {G}.

Renata, Called to the Hunt

Renata's power is equal to your devotion to green. (Each {G} in the mana costs of permanents you control counts toward your devotion to green.)
Each other creature you control enters with an additional +1/+1 counter on it.