Tetsuo Umezawa

The Umezawa name begins here. Before Toshiro got a Kamigawa block built around him and his ochre jelly, before Satoru carried the family name into the modern era, Tetsuo was the original: a Legends rare designed as Nicol Bolas's nemesis in the storyline and built on the card to function as a targeted answer to the era's dominant threat package. The aura-protection clause is the tell. In 1994, the scariest thing that could happen to your creature was a Control Magic or a Lure, and Tetsuo simply opted out of that whole axis of removal and redirection. The activated ability does the killing: a heavy activation on top of the casting cost, stacking three of the five Legends colors into one card and demanding a manabase the format could barely build. That pip-density is the constraint that makes the rate fair. The destruction itself is ordinary "destroy" templating, so a creature with a regeneration shield walks away; the targeting restriction (tapped or blocking only) is the real fence, forcing you to wait for an attack or a tap-out window rather than picking off anything at will. The whole package (untargetable by the format's premier removal, repeatable hard removal on a three-mana 3/3 body) is the closest thing Legends printed to a modern planeswalker-style threat, two decades before the card type existed.