Leyline of Eternity

If Leyline of Eternity is in your opening hand,
you may begin the game with it on the battlefield.
Create a 0/1 Legendary green plant token named
Gaia with defender, can't block and shroud. At
the beginning of your upkeep put a +1/+1.
Counter on a green creature you control. Then if
Gaia has 10 or more counters you win the game.
In the Beginning there was life and the will to keep on
living.