Lothlorien, Heart of Elvendom

As Lothlorien, Heart of Elvendom enters
the battlefield, you may reveal an Elf card
from your hand. If you don't, Lothlorien,
Heart of Elvendom comes into play tapped.
{t}: Add {g} or {u} to your mana pool.
"Caras Galadhon. The heart of Elvendom on
earth. Realm of the Lord Celeborn and of
Galadriel, Lady of Light." ~ Haldir