For a long time in the game, the second most powerful card ever printed was the Third Hokage, often revered as perhaps the strongest ninja the leaf village ever produced, who dies in an epic battle by summoning the god of death to defeat his opponent
You buy it immediately, of course
[Pokmon TCG] Battle Frontier Side Character to Unova Elite Four: Caitlin (Jet-Black Spirit [S6K] 080/070) Not many "random NPCs" end up getting brought back as late-game boss fights
Saruman of Many Colors yoinks enchantments out of opponents graveyards, which is easy to gloss over when reading the more common text about instants and sorceries
Sure, you arent drawing pure card advantage, but youre still filtering bad cards out of your hand to make sure you have straight gas for the next few turns
It shuts down lifegain, which is a very black-themed thing to do, and gives you a great draw-engine that isn't limited by tapping