Knight of Malice

Built as black's answer to white, and two of its three abilities key off the enemy color: the hexproof-from-white clause and the conditional pump both exist to sharpen the card specifically against white. The hexproof line is targeted insulation, locking out white removal and disruption while leaving the card fully exposed to everything else. The +1/+0 is a static ability, not a trigger: it reads the board and applies for as long as any player controls a white permanent, so the card sits at a first-striking 3/2 while that condition holds and drops back to a 2/2 the moment it stops. First strike is the one piece that ignores color entirely, and it is what closes the loop: a 3/2 with first strike trades up against most early white creatures and stonewalls the small attackers white tends to deploy. The card has a mirror in Knight of Grace, a white knight with the same hexproof-and-pump treatment pointed at black, and reading the two together is the cleanest way to see the intent: a pair of hatebears aimed at each other across the color pie, each reaching full size only when its rival is present. The wrinkle worth noting is that the buff keys off any white permanent, including your own, so a white-touching build can supply the condition itself rather than waiting for the opponent to hand it over.