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.
If one or more creatures die at the same time as Syr Konrad, its first ability triggers for each of those creatures.
In a Two-Headed Giant game, Syr Konrad's first ability causes it to deal 1 damage twice.