Artifact
Instant
and
sorcery
spells
you
cast
cost
less
to
cast.
Whenever
you
cast
an
instant
or
sorcery
spell,
put
a
charge
counter
on
this
artifact.
Then
if
there
are
four
or
more
charge
counters
on
it,
you
may
remove
those
counters
and
transform
it.
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