Enchantment
At
the
beginning
of
your
upkeep,
sacrifice
this
enchantment
unless
you
pay
.
Spells
cost
an
additional
"Sacrifice
a
Swamp"
to
cast
for
each
black
mana
symbol
in
their
mana
costs.
Activated
abilities
cost
an
additional
"Sacrifice
a
Swamp"
to
activate
for
each
black
mana
symbol
in
their
activation
costs.
