mtg cards like deflecting swat Progenitus Vs. Deflecting Swat : r/mtg none) open.class Deflecting Swat (CMM-698) - Commander

It's a little investment with a high reward

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This is the process that the now famous Google Deep Dream network uses for image recognition (except users tell the patter seeking to go awry on purpose)

(6/22/2015) If Gideon can't be attacked, perhaps because he has left the battlefield before the creature's controller's next combat, the creature targeted by Gideon's first ability can attack you or another planeswalker you control, or its controller can choose to have it not attack at all

More modern designs like Garth One-Eyed and O-Kagachi might be considered to fall in this category, but those legends have a little leeway to focus into other areas depending on how the deck is built and what definition you might consider for value