Artifact
Whenever
this
artifact
or
another
nontoken
artifact
you
control
is
put
into
a
graveyard
from
the
battlefield
or
is
put
into
exile
from
the
battlefield,
create
a
tapped
Powerstone
token.
(It's
an
artifact
with
"
:
Add
.
This
mana
can't
be
spent
to
cast
a
nonartifact
spell.")
