Cheapest priced copy (Commander 2019): $7.49 at Card Kingdom, near mint, their price list as of .
Ghostly Prison 
Enchantment · Uncommon · Champions of Kamigawa · #10
Creatures can't attack you unless their controller pays {2} for each creature they control that's attacking you.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
20 printings · $7.49 to $99.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2016 | 66 | Uncommon | $8.49 | — |
| Commander 2019 | 64 | Uncommon | $7.49 | — |
| Commander 2021 | 92 | Uncommon | $7.49 | — |
| Champions of Kamigawa | 10 | Uncommon | $8.99 | $39.99 |
| Commander 2011 | 14 | Uncommon | $9.49 | — |
| Conspiracy: Take the Crown | 86 | Uncommon | $8.49 | $29.99 |
| Friday Night Magic 2010 | 2 | Rare | — | $27.99 |
| Kaldheim Commander | 26 | Uncommon | $7.49 | — |
| Murders at Karlov Manor Commander | 67 | Uncommon | $7.99 | — |
| Phyrexia: All Will Be One Commander | 71 | Uncommon | $7.49 | — |
| Planechase 2012 | 7 | Uncommon | $10.99 | — |
| Planechase Anthology | 7 | Uncommon | $7.99 | — |
| The List | CHK-10 | Uncommon | $8.49 | — |
| Secret Lair Drop | 424 | Rare | — | $32.99 |
| Secret Lair Drop | 1837 | Uncommon | $7.99 | — |
| Secret Lair Drop | 7042 | Rare | — | $99.99 |
| Secrets of Strixhaven Commander | 146 | Uncommon | $7.99 | — |
| Special Guests | 19 | Mythic | $20.99 | $69.99 |
| Tarkir: Dragonstorm Commander | 116 | Uncommon | $7.99 | — |
| Crimson Vow Commander | 87 | Uncommon | $7.49 | — |
2 rulings from Wizards of the Coast
- 1 February 2007In the Two-Headed Giant format, you still only have to pay once per creature.
- 1 February 2014Unless some effect explicitly says otherwise, a creature that can't attack you can still attack a planeswalker you control.