Omnath, Zendikar Incarnate

Landfall-Whenever a land enters the battlefield
under your control for the
First time: Draw a card. Second time: Create a
5/5 Elemental creature token. Third time: Deal
damage equal to the number of elementals you
control to any target. Fourth time: You may
search your library for an elemental creature card, reveal it, and put it into your hand. Fifth time:
Add {w}{u}{b}{r}{g} to your mana pool. This mana
does not empty as steps and phases end.