Harvest Moon Death Circle

MindDelve {x}(You may discard X cards and draw
X-1 card to reduce the cost of this spell by {x}.)
You may sacrifice one or more creature as an
additional cost to cast Harvest Moon Death
Circle. For each creature sacrificed, reduce its
casting cost by {2}.
Search you library for creatures with the black
color and with a combined converted mana cost
of 13. Put them into play. Shuffle your library.
The Witchunter found murder children, not at play.