At one time, there were two separate ban lists, one that tracked cards that were banned from the Commander format in general, and another listing specific creatures that were banned as a commander but ones you could still play in your 99
Powder Keg has a very quirky feature: The tighter your deck is, the less you want to see your opponent play Powder Keg
You can also make sure you can win the turn all of your permanents come out by having Akromas Memorial in your deck, which is a seven-mana artifact that gives your creatures flying, first strike, vigilance, trample, haste and protection from Black and Red
9) Synergy packages: build modules, not spaghetti This is where deckbuilding fundamentals becomes deckbuilding that feels good. Instead of adding one-off synergy pieces that do not connect, build small packages that reinforce your plan