Voir, the Void Pacted

Noir, the Void Pacted gets +1/+1 every time he deals combat damage or destroys a creature can can move +1/+1 counters amongst black creatures its owner controls
{x}{b}{b} Exile each creature with a converted mana cost of {x} or less, owners may cast exiled cards exiled in this way by paying their mana cost or are destroyed at the beginning of your next upkeep unless its owner lets you draw 2