Claiming Lands as the center of your identity might sound funny, since land cards are a big chunk of every Commander deck
While only getting the full use of your lands every other turn is a huge downside for this effect, cards like Seedborn Muse or Wilderness Reclamation trivialize it, ensuring you can put out huge creatures that your opponents will struggle to deal with while avoiding the risk of leaving yourself open to do so
Currently, you can find MTG Arena codes in MTG Arena Starter Kits and in some legacy, pre-constructed decks too though you may struggle to find the latter at retail, as these will now be a few years old at least
and any Equipment will become unattached
No matter how you choose to build a ninja Commander deck, be sure to have your ninja tools ready like filling your deck with enough ramp, removal, protection, and creatures for combat triggers
There were honestly so many that it was harder to break them down into further subsections, so I just included all of the rest of them here