Cheapest priced copy (March of the Machine): $0.39 at Card Kingdom, near mint, their price list as of .
Phyrexian Censor 
Creature — Phyrexian Wizard · 3/3 · Uncommon · March of the Machine · #31
Each player can't cast more than one non-Phyrexian spell each turn.
Non-Phyrexian creatures enter tapped.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
1 printing · $0.39 to $0.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| March of the Machine | 31 | Uncommon | $0.39 | $0.99 |
3 rulings from Wizards of the Coast
- 14 April 2023A “non-Phyrexian spell” is any spell that doesn’t have the Phyrexian creature type, even if “Phyrexian” appears in its name. Artifact spells, battle spells, and Goblin creature spells are examples of non-Phyrexian spells.
- 14 April 2023If a player casts a non-Phyrexian spell that was countered, they can’t cast another non-Phyrexian spell during the same turn.
- 14 April 2023Phyrexian Censor looks at the entire turn to see if a player has cast a non-Phyrexian spell, even if Phyrexian Censor wasn’t on the battlefield when that spell was cast. Phyrexian Censor is a Phyrexian spell, so you could cast it and then a non-Phyrexian spell in the same turn.