big score mtg card you may place the exiled card here Big Score (JP Alternate Art)

For an MTG card size template that you can use yourself to create completely custom cards, MagicCube has got your covered

4 Herald Of Eternal Dawn Showcase Fractured Foil - $227.09 The fractured foil cards are some of the coolest Magic: The Gathering has ever released, with some of the most intricate artwork the card game has ever seen

The classic example is against a combo deck

Giver of Runes also makes a lot of Cubes, and its a fine card but is just kind of a one-mana Flagbearer which has pretty low value over replacement relative to just playing another powerful threat

Ive laid out what I brewed up as the rules for this variant and Id like to share that here