Nurgle Cultist

Whenever Nurgle Cultist or another
creature you control dies, each
opponent loses 1 life and you gain 1 life.
The deranged worshippers of the
Lord of Pestilence say that he concocts
diverse contagions to inflict on the
material universe for his amusement,
and many of the most infectious and
horrible diseases are Nurgle's proudest creations