Sanctum of All is a rare Legendary Enchantment — Shrine card from Magic Online Promos (PRM), collector number 82020.
At the beginning of your upkeep, you may search your library and/or graveyard for a Shrine card and put it onto the battlefield. If you search your library this way, shuffle. If a triggered ability of another Shrine you control triggers while you control six or more Shrines, that ability triggers an additional time.