Petra Sphinx
Creature — Sphinx
: Target player chooses a card name, then reveals the top card of their library. If that card has the chosen name, that player puts it into their hand. If it doesn't, the player puts it into their graveyard.
- CMC
- 5
- Mana cost
- Color identity
- W
- Rarity
- rare
- Set
- Chronicles
- Price
- $0.28
- EDHREC rank
- #28354
Petra Sphinx is a five-mana 3/4 flyer that turns every draw trigger into a guessing game — guess the top card right and you draw it, guess wrong and it gets buried. The payoff is too conditional to justify the slot in any serious build.
Format Analysis
Where it lives, where it can’t
| Format | Verdict |
|---|---|
| commander | legal |
| legacy | legal |
| modern | not legal |
| pioneer | not legal |
| standard | not legal |
| vintage | legal |
| pauper | not legal |
| oathbreaker | legal |
Petra Sphinx is legal in Commander, Legacy, Vintage, and Oathbreaker, but sees essentially no competitive play in any of them. In Commander, the guessing mechanic is a novelty — it can slot into Sphinx tribal lists or group-interaction decks that want to manipulate the top of the library, but five mana for a 3/4 flyer with an unreliable draw engine is a hard sell when the format has Consecrated Sphinx and Sphinx of Omniscience. Legacy and Vintage have no interest in a five-mana creature that doesn't immediately win the game or protect itself.
Key Combos
Combo lines featuring this card
Price Context
Current price
$0.28 bulk tier
At $0.28, Petra Sphinx is deep bulk — you're paying for cardboard, not power. At this price tier there's no financial downside to picking one up, but don't expect the price to move; demand simply isn't there.
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Sources
Mentioned
Updated . Data from Scryfall, EDHREC, and Commander Spellbook.