Magmat, Volcanic Force

When Magmat, Volcanic Force enters the
battlefield, reveal cards from the top of your
library until you reveal an instant or sorcery card
with converted mana cost 4 or less. You may cast
it without paying its mana cost. Put the rest of
the revealed cards on the bottom of your library
in a random order.
Whenever a spell you cast deals damage, you may
copy it. You may choose new targets for the copy.