Lace with Lava

Lace with Lava deals damage equal to target
creature's power to that creature's controller. If
this spell was cast from your graveyard, it also
deals that much damage to each other creature
that player controls. If this spell was cast from
exile, it instead deals damage equal to that
creature's power plus its toughness divided as
you choose among any number of targets and
that damage can't be prevented.