Teferi, Temporal Pilgrim

A planeswalker built entirely around a single feedback loop: the passive turns every card draw into loyalty, and the 0 ability draws a card, so the two abilities feed each other from the turn it lands. Because activating the 0 fires the passive, it functions as a de facto plus one, climbing toward the ultimate while still refilling the hand. That makes this a rare walker that ticks up while doing something, and it means the floor is a card-a-turn engine that never spends itself down. The Spirits are the payoff for the same trigger, growing every time you draw, so a board of them scales alongside the loyalty engine rather than competing with it for activations. What holds all of this together is the finish. The −12 is a steep ultimate even by Teferi standards, and the effect matches the number: the targeted opponent returns one permanent to hand, then shuffles every other nonland permanent they control back into their library, leaving them with only their lands and a fresh draw to rebuild from nothing. Getting there is what the design bends around. Entering at 4 loyalty, he needs eight more to fire the ultimate, and while the 0 chips toward that gap on its own, closing it on any reasonable clock depends on stacking extra card draw on top of the passive. He is not a threat that pressures the game on his own timeline; he is a value engine with a doomsday clock bolted on, and how fast that clock runs depends entirely on how hard the deck around him is drawing.