Omnath, Locus of Creation

When Omnath, Locus of Creation enters the
battlefield, draw a card.
Landfall - Whenever a land enters the battlefield
under your control, you gain 4 life if this is
the first time this ability has resolved this turn.
If its the second time, add {r}{g}{w}{u}.
If its the third time, Omnath deals 4 damage
to each opponent and each planeswalker
you dont control.