Vulturous Zombie

Most graveyard-growth designs want you to do the feeding: self-mill, sacrifice loops, a cheap engine you build around. The trigger here points across the table instead, paying you for whatever the game does to the player opposite you. Their fetchland cracks, their burned-down creatures, their discarded cards, their countered spells, the cards milled out of their library: each one drops another counter on a body that already flies, turning your opponent's attrition into your evasive clock. In a grindy match where both sides trade resources, it gets large almost incidentally, with no input from you beyond keeping it alive. The catch is that you don't set the growth rate; the opponent does. A passive player who never trades and never loses cards leaves it a 3/3 flier, while a removal-heavy or self-mill opponent inflates it accidentally, fattening your threat every time they try to fight you. Note the precise boundary the ability draws, too: it counts cards arriving in the opponent's graveyard, so a milled card triggers it, but a card exiled from their library never touches the yard and does nothing for you. That makes it less a build-around than a matchup-dependent threat that scales with how interactive the game runs. The more resource-hungry the opposition, the bigger it gets.