Yavanna, Lady Of Nature

Indestructible, Defender
Elementals, Plants, Saprolings, Lands and
Treefolk have +1/+1, and can't attack you or planeswalkers you control.
{t}: Add two mana of any color to your mana pool.
{x}, {t}: Search your library for X lands and put
them onto the battlefield tapped.
{x}{x}, {t}: Search your library for X Elementals, Plants, Saprolings, Treefolk or any combination
of the four and put them into your hand.