Tanazir Quandrix

The Quandrix half of the five-college Elder Dragon cycle wears its mathematical flavor on its abilities: this is a dragon built to multiply. The enters-the-battlefield trigger doubles counters on one creature, which reads as a value bump until you notice it composes with itself in a proliferate or counters-matter shell, where each doubling stacks on the last. But the attack trigger is the real design ambition. Setting every other creature's base power and toughness equal to Tanazir's turns a board of tokens or dorks into a wall of 4/4s (or larger, once you have grown Tanazir first), which is the rare anthem that scales your smallest threats up rather than nudging them a point at a time. It rewards a wide board and a tall commander in the same swing, resolving the usual tension between go-wide and go-tall into a single attack step. The sequencing matters: pump Tanazir's own power before combat and the base-stat rewrite floats every creature up to match, so the counter-doubling and the attack trigger are two halves of one engine rather than two unrelated abilities bolted to a dragon body. This is the green-blue counters commander that wants a growth curve rather than a single fatty, and the base-stat rewrite is the wrinkle that keeps the payoff from being purely additive.