Instant
Cascade
(When
you
cast
this
spell,
exile
cards
from
the
top
of
your
library
until
you
exile
a
nonland
card
that
costs
less.
You
may
cast
it
without
paying
its
mana
cost.
Put
the
exiled
cards
on
the
bottom
in
a
random
order.)
Bituminous
Blast
deals
4
damage
to
target
creature.
