In Elden Ring, which item reveals invisible walls and hidden paths in the game world?

Elden Ring has no item that reveals every invisible wall or hidden path in the game world.

Illusory walls are discovered by striking or rolling into them, while some hidden routes are revealed through exploration, environmental clues, messages, or special interactions. The game deliberately leaves many secrets unmarked, making observation and experimentation part of its dungeon design.

The Sentry’s Torch is a common source of confusion. It allows its holder to see certain invisible enemies, including some assassins associated with Ordina, Liturgical Town, but it does not reveal illusory walls. Margit’s Shackle can interact with and disrupt certain mechanisms in limited situations, yet it is not a universal secret-finding tool either. Because the question asks for a single item that reveals hidden walls and paths generally, no item is the correct answer.