wheel cards mtg of Time by Biblio you may play cards you own exiled this way until the end of your next turn Magus of the Wheel

Keeper of Fables , Raksha Golden Cub , Spirit of the Hearth and Felidar Sovereign all have a place here as well

You can, however, pay additional costs, such as a kicker cost

The second ability is mostly useless because its going to be more efficient to just pay the commander tax most of the time, but theres some really convoluted setups with Explorations, Survival of the Fittest and a mana doubler that make it potentially relevant

When you do, that spell gains conspire so you can tap two dorks that share a color to copy it for free

At $150 per box, for a conservative estimate, then this is close to $260,000 worth of product (thanks u/Mirrormn)