+2: Create a 1/1 white Kor Soldier creature token. You may attach an Equipment you control to it.
−2: You may put an Equipment card from your hand or graveyard onto the battlefield.
−10: Create a colorless Equipment artifact token named Stoneforged Blade. It has indestructible, "Equipped creature gets +5/+5 and has double strike," and equip .
Nahiri grinds out value as a mono-white Equipment commander: tick up to make Kor Soldiers and auto-equip them, use -2 to cheat heavy Equipment into play for free, and protect her with a token wall while you assemble a battlefield of suited-up creatures. You win by attacking with equipped Kor and value creatures, or by ultimating into the Stoneforged Blade for a lethal double-striking voltron threat.
Free Equipment recursion and cheating costs (-2 reuses Batterskull, Sword cycle, etc.) generates relentless card and tempo advantage
Generates her own bodies to carry gear and defend herself, so she's self-sufficient
Mono-white gives access to the deepest pool of equipment, anthems, and recursion in the format
Ultimate produces an indestructible win condition that needs only one attacker to dominate
Mono-white means no card draw or ramp without dedicated artifact/enchantment fixers, leading to mana flood and grinding out
Equipment strategies are slow and vulnerable to board wipes that strand your gear on an empty board
Planeswalker commander is a removal magnet; targeted burn and attackers can kill Nahiri before she generates value
Lacks interaction and combo speed against fast combo/control tables
Lethal voltron payoff that ramps and draws on connect with your equipped attackers.
Add fast mana and artifact ramp (Sol Ring, Smothering Tithe, the Signets white can run) plus tutors like Steelshaper's Gift and Stonehewer Giant to find and cheat your best Equipment. Lean into protection (Swiftfoot Boots-style hexproof gear, Teferi's Protection, Flawless Maneuver) to keep Nahiri alive, and tighten the curve so you reach the ultimate or a lethal swing faster; cut clunky equipment that doesn't impact the board.