Leyline of the Squall

If Leyline of the Squall is in your opening hand
you may begin the game with it in play and it
gains the following ability in addition to its
other abilities: Whenever an opponent casts
an instant or sorcery spell you may copy that
spell, if you do you may choose new targets for
the spell.
Instants and sorcery spells you control have
storm.