Finale of Promise

You may cast up to one target instant card
and/or up to one target sorcery card from
your graveyard each with converted mana cost
X or less without paying their mana costs. If
a card cast this way would be put into your
graveyard this turn, exile it instead. If X is 10
or more, copy each of those spells twice. You
may choose new targets for the copies.