Mono Black Aggro is a fast, grindy deck with Thoughtseize and Bitter Triumph disruption, so Beza, the Bounding Spring's lifegain and card draw helps stabilize against their damage and card advantage from Baron Helmut Zemo and Gray Merchant of Asphodel. Precise Redaction answers their black spells like Bitter Triumph, Invoke Despair, and Liliana the Repentant's reanimation ability indirectly by countering the creature/planeswalker spells that enable it. Spell Snare is weaker since few key cards sit at mana value 2 exactly, and The Wandering Emperor is vulnerable to their efficient removal and discard before it can protect itself, so trim both; keep Supreme Verdict and Temporary Lockdown as premier sweepers against their low-curve creature swarm.