Deathbringer Liege

The two cast triggers describe a sequenced removal pipeline rather than a one-card kill: a white spell taps target creature, and a black spell destroys a creature only if it is tapped when that trigger resolves. The order matters more than it first reads. A single Orzhov gold spell is both white and black, so it fires both lines at once, and because the tap trigger can resolve first, the black trigger can then destroy that now-tapped creature. The lock wants a turn of setup: tap with one white spell, then destroy with a later black spell, or tap something first and let a multicolored spell collect the kill. Played across two casts the engine becomes a recurring tax, every spell threatening to disable and then remove a blocker. The double anthem is the connective logic with the cost: every mana symbol is white-or-black hybrid, so the lord seats in mono-white, mono-black, or full Orzhov, and it pumps exactly the white and black bodies you were already deploying, giving you both a board to protect the engine and an engine to protect the board. The fragility is structural, though, since the entire removal sequence lives on a 3/4 that has to survive: kill the Liege and its anthems and future triggers go with it, leaving your spells to do only what they print.