Cheapest priced copy (Outlaws of Thunder Junction Commander): $0.49 at Card Kingdom, near mint, their price list as of .
Smoldering Stagecoach 
Artifact — Vehicle · */5 · Rare · Outlaws of Thunder Junction Commander · #66
Smoldering Stagecoach's power is equal to the number of instant and sorcery cards in your graveyard.
Whenever this Vehicle attacks, the next instant spell and the next sorcery spell you cast this turn each have cascade.
Crew 2
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Outlaws of Thunder Junction Commander | 30 | Rare | $0.49 | — |
| Outlaws of Thunder Junction Commander | 66 | Rare | $0.49 | — |
11 rulings from Wizards of the Coast
- 12 April 2024If the card has {X} in its mana cost, you must choose 0 as the value of X when casting it without paying its mana cost.
- 12 April 2024The ability that defines Smoldering Stagecoach's power works in all zones, not just the battlefield.
- 12 April 2024Cascade triggers when you cast the spell, meaning that it resolves before that spell. If you end up casting the exiled card, it will go on the stack above the spell with cascade.
- 12 April 2024You exile the cards face up. All players will be able to see them.
- 12 April 2024If you cast a spell "without paying its mana cost," you can't choose to cast it for any alternative costs. You can, however, pay additional costs. If the spell has any mandatory additional costs, you must pay those to cast the card.
- 12 April 2024If a spell with cascade is countered, the cascade ability will still resolve normally.
- 12 April 2024Due to a 2021 rules change to cascade, not only do you stop exiling cards if you exile a nonland card with lesser mana value than the spell with cascade, but the resulting spell you cast must also have lesser mana value. Previously, in cases where a card's mana value differed from the resulting spell, such as with some modal double-faced cards or cards with an Adventure, you could cast a spell with a higher mana value than the exiled card.
- 12 April 2024The mana value of a split card is determined by the combined mana cost of its two halves. If cascade allows you to cast a split card, you may cast either half but not both halves.
- 12 April 2024When the cascade ability resolves, you must exile cards. The only optional part of the ability is whether you cast the last card exiled.
- 12 April 2024"Cascade" means "When you cast this spell, exile cards from the top of your library until you exile a nonland card whose mana value is less than this spell's mana value. You may cast that card without paying its mana cost if the resulting spell's mana value is less than this spell's mana value. Then put all cards exiled this way that weren't cast on the bottom of your library in a random order."
- 12 April 2024A spell's mana value is determined only by its mana cost. Ignore any alternative costs, additional costs, cost increases, or cost reductions.