Professor Onyx

Liliana without the name on the tin: this is black's flagship planeswalker reimagined for a deck that wins by casting spells rather than by grinding a graveyard full of dead creatures. Magecraft is the whole hinge, and it inverts the usual planeswalker economy. Most walkers gate their payoff behind a loyalty tick and ask you to protect a body long enough to profit; this one turns every instant or sorcery you were already casting into a drain that costs each opponent two and gives you two back, so the triggered ability functions as a slow finisher while the loyalty suite does unrelated work. That reframing is what earns the slot in an archetype that rarely wants a permanent to defend at all, since a spellslinger deck's cards want to be answers, not liabilities on the battlefield. The loyalty abilities compound the pressure without ever asking you to fight for the walker's survival: a dig-plus-self-mill that leans on the lifegain cushion the passive is already generating, and a global edict that makes each opponent sacrifice their biggest creature. That last point matters more than it reads: the minus-three names no target, so it slices under hexproof and ward and cannot be dodged by chumping with the weakest body. The ultimate is a seven-iteration discard-or-lose-three loop, equal parts hand disruption and life-total guillotine against an empty grip. A payoff you cast rather than a threat you protect, bleeding the table every time you do the thing the deck already does.