Cazur, Ruthless Stalker
Combat damage as a growth engine is old ground, but the phrasing here matters: the counter lands on whatever creature connected, not on Cazur, and not only when Cazur swings. That turns a whole board of attackers into a compounding threat, because every unblocked creature comes back next turn bigger and harder to trade with. The green half of a two-card team, Cazur wants width more than height: a swarm of small bodies that each pick up a counter on the first swing snowballs faster than a single fattened threat ever could, and the ability rewards attacking into gaps rather than committing to one lane. The partner mechanic ties Cazur to Ukkima, Stalking Shadow, and the tutor-on-entry clause means either half can find the other from the deck, so the pair functions less like two commanders than one split card whose black side supplies the payoff for all those counters. Cazur builds the board; Ukkima decides what to do with the life those attackers drain. On its own the 3/3 body is unremarkable, but the design intent is transparent: this is the go-wide anchor of an aggressive counters-and-drain shell, built for a table where the game is decided by how much of your board connects, not by any single creature's raw size.

