What does the Phantasma armor do?

Could you elaborate on the functionality and capabilities of the Phantasma armor? I'm curious to know what specific advantages or benefits it provides to its wearer, and if there are any unique features or characteristics that set it apart from other forms of armor in its class. Additionally, I'm wondering if there are any limitations or drawbacks associated with using the Phantasma armor, and how it might impact the wearer's overall performance in various scenarios.