New in Reality Fracture (FRA), released October 2, 2026.

Theorist's Sanctum: Land - Island, Reality Fracture. As this land enters, you may behold a Jace. If you don't, this land enters tapped. On Mana Grove.
Build around this card with Grover
Theorist's Sanctum is a Magic: The Gathering card, a rare blue land from Reality Fracture (FRA), an expansion set released in October 2026. It is collector number 191 in that set, with art by Adam Paquette. As a land, it has no mana cost. Its colour identity is blue. It is legal in Standard, Pioneer, Modern, Legacy, Vintage, Commander, Duel Commander, Oathbreaker, Brawl, Standard Brawl, Historic, Timeless, Alchemy and Gladiator. It has been printed in 2 sets. The latest aggregated market price for this printing is $0.42 (normal finish, as of 2026-10-23).
({T}: Add {U}.)
As this land enters, you may behold a Jace. If you don't, this land enters tapped. (To behold a Jace, choose a Jace you control or reveal a Jace card from your hand.)
{2}{U}, {T}: Empower Jace 2.
Latest aggregated market price for the normal finish of this printing: $0.42 (as of 2026-10-23).
The figure covers this printing only; other printings carry their own price on their own page.
Legality of Theorist's Sanctum by format. Formats in which it is not legal are not listed.
| Standard | Legal |
|---|---|
| Pioneer | Legal |
| Modern | Legal |
| Legacy | Legal |
| Vintage | Legal |
| Commander | Legal |
| Duel Commander | Legal |
| Oathbreaker | Legal |
| Brawl | Legal |
| Standard Brawl | Legal |
| Historic | Legal |
| Timeless | Legal |
| Alchemy | Legal |
| Gladiator | Legal |
Theorist's Sanctum has been printed in 2 sets. The other printings are listed newest first, with the rarity and release year of each.
| Printing | Rarity | Year |
|---|---|---|
| Reality Fracture (FRA) #381 | Rare | 2026 |
| Reality Fracture Promos (PFRA) #191p | Rare | 2026 |
Four official rulings apply to Theorist's Sanctum, newest first.
Other land cards with a blue colour identity, ranked by how often they appear in Commander decks.