Syr Konrad, the Grim

Whenever another creature dies, or a
creature card is put into a graveyard from
anywhere other than the battlefield, or a
creature card leaves your graveyard, Syr
Konrad, the Grim deals 1 damage to each
opponent.
{1}{b}: Each player mills a card.(They each
put the top card of their library into their
graveyard)