If you do, it becomes plotted. Plotted cards can be cast on a later turn without paying their mana costs - meaning you can basically double any multicoloured instant or sorcery spells as you choose and when you choose to
Some can be saved, though, and Id be interested in trying Evolving Wilds (or at least Field of Ruin) in here
And once that big Vampire is on the field, you can start buffing it with +1/+1 counters, deathtouch, lifelink, or sacrifice it to deal that last three damage you need to win the game
Callous Oppressor (Onslaught/Legions/Scourge) Onslaught was the tribal block, so creature type mattered a lot
As for the Wastes, this is notable as one of the few non-Eldrazi flavored versions of the card, outside of some Secret Lair products
According to the team, players can complete quests in order, which will unlock prizes