Syr Konrad, the Grim Final Fantasy: Through the Ages #10 Legendary Creature Human Knight 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
The best graveyard hate cards are fast and cheap
Then to really own them play Wheel and Deal to force then to discard their hand and Draw 7 more cards.(this card works in multiplayer matches as well) If you stack the Underworld Dreams and Megrim this works best
Even late game, Undo could take out two key blockers allowing for your creatures to swing in for that last few damage
One noteworthy example is the long-forgotten fourth archangel of Innistrad, the black and white Liesa
At any other time, you may have any number of cards in hand