at minimum, youre guaranteed three extra cards per turn one for each opponents draw step
Others introduce elements to the game that increase the pace or intensity of the game, making it more interesting
Arrows of Justice Aurelia's Fury Boros Charm Captain's Maneuver Chance for Glory Deflecting Palm Double Cleave Fight to the Death Fire at Will Foundry Helix Frontline Rush Fuss // Bother Heartwarming Redemption Hide // Seek Integrity // Intervention Integrity // Intervention Intimidation Bolt Inventory Management Justice Strike Legion Leadership Lightning Helix Lorehold Charm Lorehold Command Make Your Mark Martial Glory Master Warcraft Moonhold Odds // Ends Olrin's Searing Light Rally the Righteous Reflect Damage Response // Resurgence Ride Down Sacred Fire Shattering Blow Suspend Aggression Take the Bait War Flare Warleader's Helix Wilt in the Heat Zenith Flare
Compare this to other older intellectual property crossovers, like Dracula, for example, and the stagnancy of those prices seems to support this further
In casual play, it's simply a card you own that's not in your starting deck
Ponder and Preordain Ponder and Preordain make up two-thirds of the holy trinity of cantrips in Legacy, along with Brainstorm