Cheapest priced copy (Apocalypse): $0.35 at Card Kingdom, near mint, their price list as of .
Night // Day 
// 
Instant // Instant · Uncommon · Apocalypse · #131
Target creature gets -1/-1 until end of turn.
Creatures target player controls get +1/+1 until end of turn.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
3 printings · $0.35 to $1.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Apocalypse | 131 | Uncommon | $0.35 | $1.49 |
| Dominaria Remastered | 214 | Uncommon | $0.35 | $0.49 |
| The List | APC-131 | Uncommon | $0.35 | — |
7 rulings from Wizards of the Coast
- 8 December 2022To cast a split card, choose one of its halves to cast. There's no way to cast both halves of this split card.
- 8 December 2022Each split card has two names. If an effect instructs you to choose a card name, you may choose one of those names, but not both.
- 8 December 2022Each split card is a single card. For example, if you discard a split card, you've discarded one card, not two. If an effect counts the number of sorcery cards in your graveyard, Assault // Battery counts once, not twice.
- 8 December 2022A split card's characteristics are a combination of its two halves while it is not on the stack. For example, Assault // Battery has a mana value of 5 while it is in your library. If an effect allows you to search your library for a card with mana value 4 or less, you can't find Assault // Battery.
- 8 December 2022If an effect allows you to cast a spell with certain characteristics, consider only the characteristics of the half you're casting. For example, if an effect allows you to cast a sorcery spell with mana value 2 or less from among cards in your graveyard, you could cast Assault this way, but not Battery.
- 8 December 2022If you copy a spell that's half of a split card, the copy copies that same half. For example, if you copy Assault, the copy is also Assault, not Battery.
- 8 December 2022Split cards have two card faces on a single card. The characteristics of the half you didn't cast are ignored while the spell is on the stack.