Mister Fantastic leans on card advantage and ability copying
Of course, you wont win the game for drawing yourself either
You can presumably cast anything you find off it since you already had the mana to cast the Mage, which could include mana rocks like Chromatic Lantern and Worn Powerstone, or disruptive pieces like Trinisphere and Static Orb
Brawl Legal Vintage Legal Timeless Legal Commander Legal Pauper Not Legal Oathbreaker Legal Penny Legal Toolbox Notes and Rules Information for Gandalf the White: The second ability applies only to casting spells
Ideally, the label of a proxy should be enough to tell what it's meant to substitute
Chart a Course is a bit strange in our deck since we have zero creatures, which means we're always looting rather than generating card advantage, but we do have some jump-start cards that we don't mind discarding