Nyneve, Lady of the Lake

Partner with - Merlin, The Wizard
You may look at the top card of your library.
ETB - Search your library, graveyard or exile
for Llyn Llydaw and put it into play.
{u}{g},{t}: Reveal the top card of your library.
If it's a land card, put it into play tapped.
{t}: add {u} or {g} to your mana pool.