Artifact
Morbid
—
At
the
beginning
of
each
end
step,
if
a
creature
died
this
turn,
put
a
soul
counter
on
this
artifact.
:
Add
X
mana
of
any
one
color,
where
X
is
the
number
of
soul
counters
on
this
artifact.
Spend
this
mana
only
to
cast
instant,
sorcery,
Demon,
and
Spirit
spells.