" Rest for small time
Note that there's no 'perpetual' change, which would send up red flags in paper
You should bring a tournament-legal Deck as described above, along with any tournament supplies you will need, such as paper and pen to track Life Points, dice or counters if you are using cards which require them, extra sleeves to replace any that become damaged, and so forth
The classic internet wisdom here is that Averna is theoretically less scary than other cascade commanders and less likely to get sniped by opponents, but I tend to use my removal on rampy commanders early if I can, and anyone whos played the deck knows that's a good idea
If the game isnt over yet, repeat this process for each other player in turn order
Mana ramp involves finding ways to get more of your lands onto the battlefield as quickly as possible and/or creating reusable sources of mana through permanents on the battlefield