Kiretsu's Contempt

Reveal a card from your hand. Kiretsu's contempt deals damage equal to half that card's converted mana cost divided as you choose among any number of target creatures and/or players.
Splice onto Arcane {1}{g/u} {u/r} (As you cast an Arcane spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card's effects to that spell.)