Enchantment
Landfall
—
Whenever
a
land
you
control
enters,
exile
the
top
card
of
your
library.
You
may
play
that
card
for
as
long
as
it
remains
exiled.
At
the
beginning
of
your
end
step,
if
there
are
cards
exiled
with
this
enchantment,
put
them
into
their
owner's
graveyard,
then
this
enchantment
deals
that
much
damage
to
each
opponent.