Syr Konrad, the Grim
From Modern Horizons 3 Commander set
Syr Konrad, the Grim
Legendary Creature — Human Knight
5/4
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 deals 1 damage to each opponent.
: Each player mills a card. (They each put the top card of their library into their graveyard.)