![Sphinx's Decree [Rivals of Ixalan Prerelease Promos]](http://www.lecoindujeu.ca/cdn/shop/products/abaa4b20-7880-5223-826f-423f3d30c7ca_9d4f5891-1038-4538-86ee-0912fe1b30c9.jpg?v=1707682977&width=800)
Sphinx's Decree [Rivals of Ixalan Prerelease Promos]
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| Set: | Rivals of Ixalan Prerelease Promos |
| Type: | Sorcery |
| Rarity: | Rare |
| Cost: | {1}{W} |
Each opponent can't cast instant or sorcery spells during that player's next turn.
"Be still."
—Azor