Omnath, Lord Of Beverage

(Omnath, Lord Of Beverage isn't a spell, it's
affected by summoning sickness, and it has {t}: add {r} or {g}.)
You may play Omnath, Lord Of Beverages
from the command zone.
Whenever you cast a creature spell, untap
another forest or mountain you control, then
you may put a land from your hand onto the battlefield under your control.
Whenever another land enters the battlefield
under your control, draw a card