Cloudkill - Stoic

You channel the deadly energy of your Inner Flame into a precisely controlled 20-foot-radius Sphere of yellow-green supernatural fog centered on a point within range. The fog lasts for the duration or until a strong wind disperses it, ending the spell. The area is Heavily Obscured.

Each creature in the Sphere must make a Constitution saving throw, taking 5d6 Poison damage on a failed save or half as much damage on a successful one.

A creature must also make this saving throw when the Sphere moves into its space, when it enters the Sphere, or when it ends its turn there. A creature makes this saving throw only once per turn.

The Sphere moves 10 feet away from you at the start of each of your turns.

Stoic Restraint. This spell is restrained by your Stoic State, decreasing its damage dice from d8s to d6s. This reduction applies to the initial damage and every subsequent instance of damage throughout the spell’s duration. Your Stoic State improves your Ranger spell save DC, making the cloud more difficult to resist at the cost of raw damage.

When you cast this spell, you can use Red Colour Conversion to change all Poison damage dealt by this casting to Fire damage, including damage dealt on subsequent turns. Your Stoic damage dice remain unchanged by this conversion.

Using a Higher-Level Spell Slot. The damage increases by 1d6 for each spell slot level above 5th. This increase applies to all damage dealt by the cloud throughout its duration.