Cheapest priced copy (Commander Masters): $5.49 at Card Kingdom, near mint, their price list as of .
Norn's Annex 
Artifact · Rare · New Phyrexia · #17
({W/P} can be paid with either {W} or 2 life.)
Creatures can't attack you or planeswalkers you control unless their controller pays {W/P} for each of those creatures.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
5 printings · $5.49 to $19.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander Masters | 829 | Rare | $5.49 | — |
| New Phyrexia | 17 | Rare | $6.99 | $19.99 |
| Phyrexia: All Will Be One Commander | 83 | Rare | $6.99 | — |
| The List | NPH-17 | Rare | — | $7.49Out of stock |
| Wizards Play Network 2023 | 1 | Rare | — | $5.49 |
9 rulings from Wizards of the Coast
- 1 June 2011If you control Norn's Annex, your opponents can choose not to attack with a creature with an ability that says it must attack.
- 1 June 2011If a player attacks with more than one creature, that player chooses how to pay each cost individually. For example, if you attack with two creatures, you may pay {W} for one cost and 2 life for the other.
- 1 June 2011If you're at 1 life or less, you can't pay 2 life.
- 1 June 2011Multiple Norn's Annexes controlled by the same player will each impose a cost to attack. Players choose how they pay each cost individually. For example, if a creature you control is attacking a player who controls two Norn's Annexes, you may pay {W} for one cost and 2 life for the other.
- 1 June 2011Phyrexian mana is not a new color. Players can't produce Phyrexian mana.
- 1 June 2011As you cast a spell or activate an activated ability with one or more Phyrexian mana symbols in its cost, you choose how to pay for each Phyrexian mana symbol at the same time you would choose modes or choose a value for X.
- 1 June 2011To calculate the mana value of a card with Phyrexian mana symbols in its cost, count each Phyrexian mana symbol as 1.
- 1 June 2011A card with Phyrexian mana symbols in its mana cost is each color that appears in that mana cost, regardless of how that cost may have been paid.
- 1 June 2011The controller of each creature attacking you or a planeswalker you control pays either {W} or 2 life as attackers are being declared.