Karthus, The Deathsinger

If Karthus dies; create a "Death defied" token on the
battlefeild, Karthus's power is equal to the number of creatures in your graveyard and on the battlefeild.
{3}{b}: Deal half Kartus's power to target creature. If
controller has 1 creature on the battlefeild; doesn't half.
{2}{b}: Creatures with toughness 2 or greater get -1/-1
until your next endstep. activatable only once per turn.
{t}{4}{b}{b}: Deal 5 damage to all creatures.