The absolute best example is Touch of MoongloveTouch of Moonglove, which will not only wipe out every creature with a single point of your trample damage each, but will also drain the blocking player for every blocker that dies in the process
For one section, I list snippets of rules text
Exiling graveyards is only one of four modes on Guile, with each other mode being situationally just as important
It may not be a human, but Kiki-Jiki, Mirror Breaker can be added to any deck that runs red and white, mainly because then you can run other creatures like Restoration Angel and Zealous Conscripts and go infinite on the spot to win the game
In second edition TSR had the bright idea to print off monster stats, not in easy to keep books like before or since, but in one giant binder, where you could hole punch and add in other pages