Collective Nightmare
Instant
Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for 
or one mana of that creature's color.)
Target creature gets -3/-3 until end of turn.
- CMC
- 3
- Mana cost
- Color identity
- B
- Rarity
- uncommon
- Set
- March of the Machine
- Price
- $0.13
- EDHREC rank
- #22548
Collective Nightmare wipes every creature an opponent controls for each Swamp you control — at enough land count, that's a one-sided board wipe stapled to a black spell. The cost is real: it hits only one opponent, and it demands a heavy basic-Swamp commitment to scale.
Format Analysis
Where it lives, where it can’t
| Format | Verdict |
|---|---|
| commander | legal |
| legacy | legal |
| modern | legal |
| pioneer | legal |
| standard | not legal |
| vintage | legal |
| pauper | not legal |
| oathbreaker | legal |
In Commander, Collective Nightmare earns its slot exclusively in mono-black or heavily black decks with 20-plus Swamps, where it routinely clears a full board for five or six mana while leaving yours intact. Outside of that shell, the single-target clause is a liability — you're spending a card to handle one of three opponents. In Legacy, Modern, and Pioneer it's a non-starter; Fatal Push, Toxic Deluge, and Damnation handle the job more efficiently and without the land-count tax. Oathbreaker's 1v1 structure softens the single-target penalty, making Collective Nightmare a plausible role-player in a mono-black build there.
Key Combos
Combo lines featuring this card
Price Context
Current price
$0.13 bulk tier
At $0.13, Collective Nightmare is deep bulk — zero barrier to pick up a copy if your deck qualifies. Bulk rares with narrow conditions tend to stay at the floor, so don't expect movement.
Explore
Sources
Mentioned
Updated . Data from Scryfall, EDHREC, and Commander Spellbook.