Cheapest priced copy (Double Masters 2022): $2.99 at Card Kingdom, near mint, out of stock, their price list as of .
Magister Sphinx 
Artifact Creature — Sphinx · 5/5 · Rare · Archenemy · #89
Flying
When this creature enters, target player's life total becomes 10.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
4 printings · $2.99 to $5.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Double Masters 2022 | 247 | Rare | $2.99Out of stock | $4.99 |
| Double Masters 2022 | 519 | Rare | — | — |
| Archenemy | 89 | Rare | $2.99Out of stock | — |
| Conflux | 116 | Rare | $5.99 | $4.99 |
3 rulings from Wizards of the Coast
- 1 February 2009This ability is not optional.
- 1 February 2009For a player's life total to become 10, what actually happens is that the player gains or loses the appropriate amount of life. For example, if the targeted player's life total is 4 when this ability resolves, it will cause that player to gain 6 life; alternately, if the targeted player's life total is 17 when this ability resolves, it will cause that player to lose 7 life. Other cards that interact with life gain or life loss will interact with this effect accordingly.
- 15 June 2010In a Two-Headed Giant game, this ability basically causes the team's life total to become 10, but only the targeted player is considered to have actually gained or lost life.