do mtg cards hold value Will Firion's at 340 on Manabox? When trading, roughly which value

Ive mostly seen it excel as a Voltron commander where you can put all your eggs in one basket (Shun Yun) and deliver deadly commander damage to your enemies

recently, six-mana planeswalkers like Liliana, Dreadhorde General, Garruk, Cursed Huntsman, and Chandra, Awakened Inferno have seen fringe play as 1- or 2-ofs

This image is a rainbow confetti version, but you can also get a non-foil version of this for a market price of $136.63

This ability is very similar to cascade in the sense that both let you cast spells for free, with the difference is that the mana value of the cascade card determines what you can cast, and discover X is based on the value of X printed on the discover card