Tatterkite

The second line is the entire reason this evader exists, and it reads stranger today than when it was printed. "This creature can't have counters put on it" was a niche defensive clause in an era that leaned on -1/-1 counters as a set-wide removal vector: a Scarecrow that simply ignored the shrink effects flooding the environment, untouchable by the wither-style chip damage that defined fights at the time. The 2/1 body is plain and the flying is just flying; the prohibition is the whole identity. What makes the card more durable than its modest stats suggest is how that clause aged into a different kind of relevance. Counters became one of Magic's central engines, and the effects that disrupt creatures through them multiplied: proliferate, infect, the various "put a counter on it" removal lines. Against all of that, Tatterkite is permanently immune by rules text, no response required. The constraint that keeps a hard immunity in check is that it cuts both ways: you can still pump it with a Giant Growth, suit it up with equipment, or buff it under an anthem, but you can never grow it with +1/+1 counters, never adapt or monstrosity it, never let proliferate work in your favor. The design is a clean trade: total resistance to one category of effect, in exchange for never benefiting from that same category. It is the rare creature whose best use is sometimes as a deliberate non-target rather than a threat.