Omnath, Locus of Souls

When Omnath, Locus of Souls enters the
battlefield, if {w}{w} was spent to cast it, Omnath
gains indestructible and lifelink. If {u}{u} was
spent, Omnath gains "{t}: Draw three cards."
If {b}{b} was spent, return all creature cards
from your graveyard to the battlefield tapped.
If {r}{r} was spent, Omnath gets +5/+0 and
gains haste. If {g}{g} was spent, lands you
control produce an additional {g} when
tapped for mana. If none of the above
were spent, exile all creatures.