A-Omnath, Locus of Creation

When Omnath, Locus of Creation enters, draw a card.

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