Its effect is kind of m'eh, though, just buffing Gus depending on the amount of wins and losses you have with a specific opponent, which is sure out-of-the-box but not as zany as some of the other effects on this set
When Cavalier of Flame dies, it deals X damage to each opponent and each planeswalker they control, where X is the number of land cards in your graveyard
At three willpower, she's a great early play when you have other, smaller Inventors like Gadget Hackwrench, Perceptive Mouse out on the table
Value can be subjective, but Magic: The Gathering cards are generally considered valuable if theyre extremely beneficial in play and/or hard to find
You can still burn or counter anything you need to to stay alive in the early game, and then once Niv-Mizzet, VisionaryNiv-Mizzet, Visionary comes down, the burn spell you have left over is a draw spell
That's fun too