The Baited Black Rose

Once Karthus is in play, the deck’s power spikes significantly because all Deathknell effects trigger twice. This turns routine sacrifices into major advantage with double draws, double damage, or repeated value using Leblanc's legend ability to create copies, as well as Mirror Image to multiply your best units, or your opponents. The deck wins by chaining these upgraded threats and doubled death triggers until the opponent can no longer keep up with the board pressure.