Instant
You
may
exile
a
white
card
from
your
hand
rather
than
pay
this
spell's
mana
cost.
Prevent
the
next
7
damage
that
would
be
dealt
to
any
target
this
turn.
If
it's
a
creature,
put
a
+0/+1
counter
on
it
for
each
1
damage
prevented
this
way
at
the
beginning
of
the
next
end
step.
