Aenea, Elven Huntmistress

Eminence - If Aenea, Elven Huntmistress, is in your command zone or the battlefield, whenever an Elf creature enters the battlefield, add {g} to your mana pool.
{t}: Add {g} to your mana pool.
Alliance (The first time you would play a card with
a color identity that does not match this Commander,
you may reveal a face down second commander if
both cards have Alliance.)