Marwyn, the Nurturer

Whenever another Elf you control enters, put a +1/+1 counter on Marwyn, the Nurturer.
{T}: Add an amount of {G} equal to Marwyn's power.

Elvish Visionary

When Elvish Visionary enters, draw a card.

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

{G}: Regenerate another target Elf.
{2}{G}{G}{G}: Elf creatures you control get +3/+3 and gain trample until end of turn.

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

{T}: Add {G} for each Elf on the battlefield.

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

Other Elves you control get +1/+1.
{G}, {T}: Create a 1/1 green Elf Warrior creature token.