**Name**: **Aether's Veil**

**Description**:
Aether's Veil is an ethereal cloak that grants its user the ability to manipulate space and dimensions. This Sacred Gear is considered one of the most powerful Longinus, capable of altering the very fabric of reality itself.

**Appearance**:
When activated, Aether's Veil manifests as a shimmering, translucent cloak that envelops the user, giving them a ghostly, otherworldly appearance. The cloak glows with a soft, multi-colored light that seems to shift like the colors of the aurora borealis.

**Abilities**:

1. **Spatial Manipulation**:
    - **Warp Step**: Allows instantaneous teleportation within a certain radius. The user can move from one point to another without crossing the intervening space, effectively allowing them to blink in and out of existence briefly.
    - **Spatial Pocket**: Grants the ability to create small pocket dimensions where the user can store objects or even hide themselves or allies temporarily.

2. **Dimensional Slash**:
    - The user can create rifts in space that can cut through almost any material. These slashes are incredibly sharp and can be directed at enemies or used defensively to block attacks.

3. **Veil of Invisibility**:
    - The cloak can render the user invisible and intangible, allowing them to phase through objects and avoid attacks. However, this ability consumes a significant amount of the user's energy.

4. **Realm Shift**:
    - As a Balance Breaker ability, the user can shift an entire area into a parallel dimension for a limited time. In this realm, the user has complete control over the environment and can manipulate the terrain, weather, and gravity to their advantage.

5. **Dimensional Prison**:
    - Encases opponents in a cube of compressed space, restricting their movement and abilities. This prison is incredibly durable and difficult to escape from without significant power or spatial manipulation abilities.

**Drawbacks**:
- The immense power required to manipulate space and dimensions can quickly drain the user's energy. Prolonged use of Aether's Veil or its more powerful abilities can lead to severe fatigue.
- Overuse of the cloak's invisibility or intangibility can temporarily weaken the user's physical body, making them more vulnerable to attacks.

**User Ideals**:
The ideal wielder of Aether's Veil is someone with a sharp strategic mind and a strong will, capable of handling the immense strain that comes with manipulating space and dimensions. They must also have a deep understanding of their surroundings and the tactical awareness to use the Sacred Gear's abilities effectively in battle.

**Lore**:
Aether's Veil was said to be crafted from the essence of the primordial void, a fabric of reality untouched by time or space. It was believed to have been wielded by an ancient hero who used it to protect the world from otherworldly threats, bending reality itself to fend off invaders from alternate dimensions.