Brutal Hordechief

Two cards in one body, joined by the fact that they reward you for attacking wide. The drain trigger is the engine half: every creature that swings in pulls a life off the defending player and feeds it back to you, so a board of small bodies turns each combat into a Blood Artist sweep that scales with how many attackers you committed. That alone makes it a payoff for go-wide aggro, but the activated ability is what turns the payoff into a kill. For three generic and a pair of red-or-white pips, you seize the opponent's entire defensive plan: they must block if able, and you assign the blocks. The window matters. You fire it after declaring attackers, so you can force a guaranteed lethal puzzle, channel blocks onto chump targets, or simply drain unimpeded because nothing was a legal blocker for the creature you wanted to push through. The hybrid cost is the tell that this was built as a Mardu warlord rather than a mono-black finisher: the body lives in black, but the lethal button asks you to be in red or white as well. Used together, the two halves close the loop that aggressive boards usually leave open. You no longer need to find the alpha-strike geometry; you dictate it, then take the difference in life every time.