Filling the year full of awesome cards and incredible sets, if anything, MTG players have had too much of a good thing this year
Snorlax You cant escape from the sleeping giant There are few things as frustrating as playing against control-heavy decks in the Pokmon TCG, and Snorlax is a perfect example of why
Or these three
3-Deep Analysis/ Burning Vengeance: These seem pretty innocuous to be third on my list, but anytime I can get more utility out of cards in my graveyard I am totally on board
Could also be used to turn your commander into a tutor for a specific thing, Derevi, Empyrial Tactician shenanigans come to mind, and anything using Pyre of Heroes in a similar fashion
It copies another target creature we control until end of turn, except its name is Gogo, Mysterious Mime, meaning it can copy Legendary creatures