Twin Omnaths

When Twin Omnaths enters the battlefield, draw
4 cards.
Landfall - Whenever a land enters the battlefield
under your control, you gain 8 life and draw 2
cards. If it was the second time this turn, repeat
this process but add {w}{u}{r}{g} twice to your
mana pool and deal 4 damage to each creature.
Whenever Twin Omnaths is dealt damage,
regenerate it and draw a card, then add {r}{g},
gain 2 life, proliferate, and deal 2 damage to
any target.