Let's look at five famous people and imagine what their cards could be
Unfortunately, the fact that everyone had this card in their decks allowed many FTK decks to thrive, and it took far too long for this card to be added to the Forbidden & Limited Card List
#3 legendofa For planeschase I wouldn't say it's obscure particularly from the MOM commander precons but Archenemy is certainly less well known and your right Thunder Junction would be a prime candidate for a new archenemy though 99.99999999999999% sure that it won't happen and probably will not get another archenemy any time soon or ever as the Nicol Bolas one did poorly over all
Only 3 Nissa seems kinda odd and I did play 4 for a very long time but it was kinda clunky for me in many occasions people play cards like Mystical Dispute, Aether Gust, Negate and drawing 2 or 3 Nissa often forces you to make unfavorable plays
She also reads, Whenever a creature you control with a +1/+1 counter on it dies, return that card to the battlefield under your control at the beginning of the next end step. This means that not only can you just constantly swing in to win, but that your Creatures are bigger when they do so, and also incredibly hard to kill permanently
C Nine mana is quite expensive, but that's the price you pay for a spell that can often end the game when cast