Prohibit
Instant
Kicker 
(You may pay an additional as you cast this spell.)
Counter target spell if its mana value is 2 or less. If this spell was kicked, counter that spell if its mana value is 4 or less instead.
- CMC
- 2
- Mana cost
- Color identity
- U
- Rarity
- common
- Set
- Modern Horizons
- Price
- $0.18
- EDHREC rank
- #21827
Prohibit counters any spell with converted mana cost 2 or less for two mana — clean, unconditional within its range, and good enough to run in formats where cheap interaction matters. In Commander, where the most dangerous early plays (Sol Ring, Arcane Signet, Cyclonic Rift's overload is too expensive, but Demonic Tutor and Counterspell itself both fall inside the window) frequently cost two or less, that range is more relevant than it first appears.
Format Analysis
Where it lives, where it can’t
| Format | Verdict |
|---|---|
| commander | legal |
| legacy | legal |
| modern | legal |
| pioneer | not legal |
| standard | not legal |
| vintage | legal |
| pauper | legal |
| oathbreaker | legal |
In Commander, Prohibit earns its seat by blanket-countering the two-mana spells that define early game tempo — tutors, mana rocks, cheap removal — without any targeting restriction. Pauper is its best format: at common, two-mana hard counters are a premium resource, and Prohibit slots cleanly into any blue control shell that wants redundancy beyond Counterspell. In Legacy and Vintage the CMC ceiling is simply too low to justify it over Force of Will or Mana Drain, so Prohibit doesn't see competitive play there. Modern has largely the same problem — the format's threats routinely cost three or more, and better cheap counters exist.
Key Combos
Combo lines featuring this card
Price Context
Current price
$0.18 bulk tier
At $0.18, Prohibit is deep bulk — you'll find copies in any commons box without looking hard. The price is stable by definition; there's no demand pressure that would move it, and wide availability keeps a reprint irrelevant.
Explore
Sources
Mentioned
Updated . Data from Scryfall, EDHREC, and Commander Spellbook.