Since Tuvasa is your commander, you only need to get it to 21 damage on each opponent before you win, something incredibly easy to achieve while you protect it with an Asceticism and beef it up with Ethereal Armor and All That Glitters
4 Add: Reliquary Tower Removing Your Maximum Hand Size Synergizes With Your Constant Card Draw Because a lot of your gameplay will revolve around card draw, especially if you do add Ophidian Eye to the mix, I highly recommend adding a Reliquary Tower
Similarly, if a double strike creature is blocking, it can only block one creature per combat
More importantly however are the ease with which you can get to your ultimate and Steward of Elements shines in that department as well
[1] Players can battle against other players online
VII was the first token-maker to allow you to choose between five sets of colors and creature types on a 1/1 creature token