Part of what happens is we choose a theme and then we bend design toward that theme
Planeswalkers are not creatures, so deathtouch does not destroy planeswalkers any faster than regular damage
After all, Sapling of Colfenor is one of the most-played cards in a Doran the Siege Tower deck, the previous toughness-matters Commander in Abzan colors
The first instance from the hated Rhystic cycle on this list, Rhystic cards could be fully negated if any player paid a certain amount of colorless mana
For starters, Ocelot Pride needs The Citys Blessing in order to enable this doubling ability in the first place
Released in the MTG set Phyrexia All Will Be One, Phyrexian Vindicator costs four white mana, so it's almost impossible to play outside of a mono-white deck