Fallswind, Wings of the Old

Flying, lifelink
Whenever another Griffin enters the battlefield
under your control, draw a card then untap two
target lands you control.
{1}{w}{w}{u}: Search your library for a Griffin card
reveal it then put it into your hand, Fallswind,
Wings of the Old gets +X/+0 until end of turn
were X Is the reveled Griffin's mana cost.