Soul Divination

As an additional cost to cast Soul Divination, sacrifice any number of creatures and/or discard
any number of creature cards. For each creature sacrificed and/or creature card discarded this
way, Soul Divination costs {1} less to cast.
Reveal the top X cards of your library. For each
card revealed this way, if it has mana value X or
less, put it into your hand, each opponent loses
1 life, and you gain 1 life. Otherwise, put it into
your graveyard.