Artifact
Whenever
a
nontoken
creature
you
control
enters,
you
may
pay
.
If
you
do,
create
a
token
that's
a
copy
of
that
creature,
except
it
has
haste
and
"At
the
beginning
of
the
end
step,
sacrifice
this
permanent."
To crack a mirror is to provide an opening for the reflection to escape.
