Walking on Hell

You conjure a mass of sticky webbing at a point within range. The webs fill a 30-foot Sphere there for the duration. The webs are Difficult Terrain, and the webs alight with flame. Any creature that starts within the web takes 3d6 Fire damage.

If the webs aren’t anchored between two solid masses (such as walls or trees) or layered across a floor, wall, or ceiling, the web collapses on itself, and the spell ends at the start of your next turn. Webs layered over a flat surface have a depth of 5 feet.

The first time a creature enters the webs on a turn or starts its turn there, it must succeed on a Dexterity saving throw or have the Restrained condition while in the webs or until it breaks free.

A creature Restrained by the webs can take an action to make a Strength (Athletics) check against your spell save DC. If it succeeds, it is no longer Restrained.

While the spell is being concentrated on the web is immune to fire, however once the spell is over the web burns away leaving nothing but ash.

Using a Higher-Level Spell Slot. The damage increases by 1d6 for each spell slot level above 2.