Cheapest priced copy (Phyrexia: All Will Be One Commander): $12.99 at Card Kingdom, near mint, their price list as of .
Norn's Decree 
Enchantment · Rare · Phyrexia: All Will Be One Commander · #9
Whenever one or more creatures an opponent controls deal combat damage to you, that opponent gets a poison counter.
Whenever a player attacks, if one or more players being attacked are poisoned, the attacking player draws a card.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $12.99 to $13.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Phyrexia: All Will Be One Commander | 9 | Rare | $13.99 | — |
| Phyrexia: All Will Be One Commander | 47 | Rare | $12.99 | — |
One ruling from Wizards of the Coast
- 4 February 2023A player is poisoned if that player has one or more poison counters.