Xylara, The Light of Life

Indestructible, Vigilance, Lifelink, Flying
When this creature enters the battlefield, you
gain X life, add X mana of any color, and
create X 2/2 white and green elemental creature
tokens with lifelink.
Whenever you gain life, draw a card and add {g}{w}
Pay X mana: search your deck for half X lands
and put them onto the battlefield tapped.
Whenever you tap for mana, Gain 1 life.
"I heal the land, and the land heals you."