Korask, the Plague

Deathtouch
{3}{b}{t}: Target creature you don't control gets
-X/-X, where X is the number of counters on
target permanent you do control. Until end of
turn, whenever the target creature is put into
the graveyard, create an Y/Y black creature
token with Deathtouch, where Y was the
number of counters on the target permanent.