In Dark Souls 2, players can encounter Illusory Walls, which are secret barriers that hide entrances to hidden rooms or passages. Unlike in previous entries of the series, Illusory Walls in Dark Souls 2 cannot be revealed by attacking them; instead, players must interact with them directly using the appropriate button for their platform: A on Xbox 360, X on PS3, or Shift + Left Click on PC. This interaction will cause the wall to disappear or open, granting access to concealed areas or valuable items.

Key Features of Illusory Walls:

1. Interaction Required: The primary method to unveil these walls is through player interaction rather than combat. Simply walking up to a wall that appears suspicious and pressing the interact button is all that’s needed.

2. No Breaking: Attacking an illusory wall will have no effect—players will not break or reveal the wall as they might have done in prior Dark Souls titles.

3. Addressing Blocked Interactions: Sometimes player messages left on the ground can obstruct your ability to interact with an illusory wall. If this occurs, rapidly pressing the interact button can allow you to reveal the wall after the message dialog has closed.

4. Variety in Locations: Illusory Walls can be found in several varied locations throughout the game, including the Forest of Fallen Giants, No-Man’s Wharf, Dragon’s Sanctum, and Frozen Eleum Loyce. Exploring these areas thoroughly can lead to discovering valuable secrets.

5. Pharros’ Lockstones and Other Mechanisms: While most illusory walls are accessed through direct interaction, certain hidden compartments may involve Pharros’ Lockstones or explosives. This is distinct from the standard illusory walls and requires different methods of interaction.

6. Multiplayer Mechanics: In the multiplayer mode of Dark Souls 2, only the world host is able to open illusory walls. Phantoms, who are players summoned into the world, can identify and point out the walls to the host but cannot activate them themselves.

Summary:
To successfully reveal an illusory wall in Dark Souls 2, players should focus on interacting with the wall rather than attempting to attack it. By standing close to it and pressing the interact button, you can uncover the secrets that lie beyond. Exploring meticulously in areas known for these hidden walls can greatly enhance your gaming experience with the discovery of new paths and treasures.