Blaze Storm

A contained hell with a minimum of 3 feet diameter emanates from you and expands up to 60 feet in diameter, enemies within the dome must make a dex saving throw, on fail targets are seared. On a success, the creature is only deafened and takes half damage. When creatures are within the dome, they take 2d4, when entering or exiting the dome without permission the creature rolls a dex save, on fail the creature takes 4d4 damage and is seared, on success the creature takes half the damage. When the spell is cast, the user gains fatigue, when the spell creates a dome 5 feet or under, the user gains no fatigue but expands a spell slot. when the spell creates a dome 15 feet or under, the user gains 1 fatigue, when the spell creates a dome 30 feet or more, the user gains 2 fatigue, when the spell creates a dome 50 feet or more, the user gains 4 fatigue. While under the effects of sear, they take 2d4 + 1d4 more each turn, this effect cannot be negated. While the spell is active the dome follows the user as the vertex, and the user's movement is reduced to 15 feet. The blazing dome will not disappear until the user maxes out their fatigue counter or dispels it, and the seared will continue to burn. 

This spell’s damage increases by 1d4 for every spell slot above 2nd.