Miasma Priest

For New Eridu, the Hollow is a catastrophe of despair. And when a Hollow expands, fear, death, suffering... all forms of despair devour people's minds, altering the fates of countless souls.
The omens of doom began in the shadows of the Hollow, yet some heard a strange calling within, glimpsing a sliver of... hope and redemption amidst despair.
Since then, they heeded that secret call to form a clandestine organization, and the Miasma Priests lurked in the shadows of Eridu... spreading Their blessing to those who had lost their way.
The "Miasma Priests" believe that the Hollow's expansion is no mere natural disaster. Generation after generation, the "Priests" have tirelessly pursued the hidden truth behind it, seeking to achieve their desired truth... that the will within the Hollow shall ultimately become reality.
However, sacrifices are necessary in this process, and minor troubles are inevitable. Even being targeted by Void Hunters and hunted by major organizations are merely trivial setbacks on the path to truth.
After a lengthy effort and thorough preparation, the "Miasma Priests" have finally summoned that will from the Hollow, allowing it to descend upon the world with near-perfect form. The Miasma that coils and covers the "Miasma Priests," that corrupting substance untouchable to others, has become for them dazzling weapons and armor.
All of this serves as the ultimate proof of their blessed status.
"Their will... shall finally descend upon this world."
"What you must do is simple..."
"Listen, obey, and then... accept Their blessing!"

During combat, the Miasma Priest will switch between different phases and use special skills for each phase. When Agents activate Perfect Assist against some of the Miasma Priest's skills, it won't consume Assist Points, and after multiple Defensive Assist activations in a short time, the Miasma Priest will enter a special Stagger state, during which Agents can deal increased DMG to the Miasma Priest.