Draft is an advanced rule where players draft decks using cards given to them by the Gold Saucer instead of using their own decks
As you draft more, you will realize that different deck archetypes work best with the hump of the curve at different points, but in the early days this should be enough to get you by
You can find this effect for far less mana on cards like Grand Abolisher, Kutzil, Malamet Exemplar, and Myrel, Shield of Argive
Arena Cube Best of One Entry Fee : 4,000 gold Match Structure : BO1 Max Rewards : 6,000 gold and 1 uncommon and 2 rares Max Wins / Losses : 7 / 3 Best of Three Entry Fee : 4,000 gold Match Structure : BO3 Max Rewards : 6,000 gold and 2 uncommons and 1 rare Max Wins / Losses : 7 / 3 Arena Cube comes around MTGA once in a blue moon and is the equivalent of the Vintage Cube from MTGO, meaning you get to draft the best cards that Arena has ever seen