To attempt to formalize things a bit further, the new Commander Panel introduced Game Changers, a list of cards whose inclusion marks a more powerful deck
7 Nissa, Resurgent Animist 162 (Extended Art) - $21.48 Back on the list for the most valuable cards in March of the Machine: The Aftermath is Nissa, Resurgent Animist, though this time it's the extended art version
Graveyard Hate Tutors Waterlogged Teachings is a nice instant tutor that greatly helps our build consistency
New Arena players are offered several pre-made decks to start with (like the Welcome Decks and Intro Decks offered in brick and mortar stores) or they can spend real money to purchase booster packs or enter events, gathering single cards to brew their own decks from scratch
The way I usually approach Magic is not with a proactive strategy that tries to find ways around opponent answers, I am much rather on the other side building my deck in a way where I can just trade resources and win a lategame with power is always my cup of tea and fortunately the most dominating decks in Standard usually tend to be that way if you build and play them correctly