ETCHEDCheapest priced copy (March of the Machine: The Aftermath): $0.49 at Card Kingdom, near mint, their price list as of .
Niv-Mizzet, Supreme 
Legendary Creature — Dragon Avatar · 5/5 · Rare · March of the Machine: The Aftermath · #140
Flying, hexproof from monocolored
Each instant and sorcery card in your graveyard that's exactly two colors has jump-start. (You may cast that card from your graveyard by discarding a card in addition to paying its other costs. Then exile it.)
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
5 printings · $0.49 to $6.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| March of the Machine: The Aftermath | 40 | Rare | $0.49 | $0.49 |
| March of the Machine: The Aftermath | 90 | Rare | $1.79 | $0.49 |
| March of the Machine: The Aftermath | 140 | Rare | — | — |
| March of the Machine: The Aftermath | 175 | Rare | $1.49 | $2.49 |
| March of the Machine: The Aftermath | 219 | Rare | — | $6.99 |
4 rulings from Wizards of the Coast
- 12 May 2023You must still follow any timing restrictions and permissions, including those based on the card's type. For instance, you can cast a sorcery using jump-start only when you could normally cast a sorcery.
- 12 May 2023If an effect allows you to pay an alternative cost rather than a spell's mana cost, you may pay that alternative cost when you jump-start a spell. You'll still discard a card as an additional cost to cast it.
- 12 May 2023If an instant or sorcery card is put into your graveyard during your turn, you'll be able to cast it right away if it's legal to do so, before any player may attempt to remove that card from your graveyard.
- 12 May 2023A spell cast using jump-start will always be exiled afterward, whether it resolves, it's countered, or it leaves the stack in some other way.