Whenever Scriv enters or attacks, create a white Aura enchantment token named Contract attached to target creature an opponent controls. The token has enchant creature and "Whenever enchanted creature attacks, it gets +2/+0 until end of turn if it's attacking one of your opponents. Otherwise, its controller loses 2 life."
Scriv is a political punisher commander: every time it enters or attacks, you slap a Contract aura on an opponent's creature, taxing them either by forcing it to swing at a rival or bleeding its controller for 2. You attack with an evasive deathtouch body each turn to manufacture more Contracts, turn the table on each other, and grind everyone down while you stay safe behind a pillow fort. Win by accumulating life loss, constellation/enchantment payoffs, and finishing with deathtouch evasion or a forced bloodbath.
Repeatable, recur-proof value: every attack makes another Aura token you control even if Scriv is removed mid-combat (ETB triggers on recast).
Flying + deathtouch makes Scriv a great attacker and a brutal blocker that trades up against anything.
Steers the table—opponents are incentivized to swing at each other, keeping aggression off you.
Generates a steady stream of enchantment ETBs, fueling constellation and enchantress payoffs.
Each individual Contract is slow; you need many triggers to actually close a game.
Politically soft—savvy opponents simply don't attack and quietly eat 2 life, removing the upside.
Relies on Scriv connecting or re-entering; without protection, repeated commander removal stalls the engine.
BW lacks card draw and ramp compared to other colors, so engines can sputter.
Punishes the attacks Scriv encourages and slows the table's tempo while you grind.
Add efficient enchantress payoffs (Sythis, Eidolon of Blossoms, Setessan Champion) and constellation engines to convert every Contract into cards, then layer goad and 'must attack' effects (Marisi, Disrupt Decorum, Grand Melee) so the +2/+0 mode is mandatory. Tighten the manabase with fast rocks and reliable commander protection/recursion (Swiftfoot Boots, Sun Titan, Reconnaissance) so Scriv attacks unimpeded every turn, and add a closing engine like a strong group-slug package or aristocrats drain to actually end games before they stall.