Omnath, Locus of Creation

When Omnath, Locus of Creation
enters, draw a card.
Landfall — Whenever a land you control enters, you gain 4 life if this is the first time this ability has resolved this turn. If it's the second time, add RedGreenWhiteBlue.
If it's the third time, Omnath deals 4
damage to each opponent and each planeswalker you don't control.