Professor Dellian Fel

Four mana for a planeswalker that starts at five loyalty, and two of its four abilities are wired to the same resource: life gained. The +2 gains flatly, padding the loyalty while stockpiling the very number the ultimate cares about; the 0 draws at a life cost the +2 comfortably repays; the −6 emblem then reframes every subsequent point of that lifegain as opponent life loss, weaponizing clicks you were already inclined to make. That is the design's cleverness: the plus and the ultimate speak the same language, so the emblem is less a finisher you build toward than a switch that turns the whole loyalty curve into a drain engine. The −3 sits outside that loop as a hard creature-removal click, the pressure valve that keeps the walker on the battlefield against boards that would crack it before the emblem lands, at the price of setting loyalty back toward zero. Lifegain-as-lifeloss is old ground in Golgari, worked over by permanents and triggered abilities for years, but folding the payoff into a planeswalker emblem changes the tempo of answering it. Opponents cannot simply destroy the enchantment that would normally carry this effect; they have to answer a body that gains life every turn it survives and threatens to convert each point of it into their own loss.