Strengths:

Intriguing Premise: The concept of a new Holy Grail War emerging in a city designed specifically as a battleground is both fresh and captivating. The blend of mysticism with the urban environment of Snowfield adds a unique layer to the traditional Holy Grail War setting, promising a blend of familiar and novel elements.

Complexity and Suspense: The introduction of a missing Servant class and impossible summonings adds layers of complexity and intrigue. These elements create a sense of mystery and suspense, engaging readers with the anticipation of uncovering hidden truths and navigating unexpected twists.

Atmospheric Setting: Snowfield is portrayed as a city shrouded in secrecy and designed as a battleground, contributing to the dark and enigmatic atmosphere of the story. The setting plays a crucial role in shaping the tone of the narrative, enhancing the overall sense of danger and uncertainty.

Character Dynamics: The dynamic between Masters and Servants is central to the story, with each character bringing their own motivations and strategies to the conflict. This diversity adds depth to the interactions and battles, making for an engaging read.

Areas for Improvement:

Background Information: For readers unfamiliar with previous Holy Grail Wars, more background information on the mechanics of the Grail Wars and the significance of the Holy Grail could be beneficial. Providing context on the history and rules of the Grail Wars would help in understanding the stakes and nuances of the new conflict.

Character Development: While the premise sets up an intriguing conflict, further exploration of the characters' backgrounds, motivations, and relationships would enrich the narrative. Developing the Masters and Servants' personal stories would add emotional depth and increase reader investment.

Pacing: Balancing the intricate details of the new Holy Grail War with the unfolding action is crucial. Ensuring that the pacing remains steady and engaging, without overwhelming readers with too much information at once, will help maintain interest and clarity.