You create a 20-foot-radius Sphere of yellow-green fog centered on a point within range. The fog lasts for the duration or until strong wind (such as the one created by Gust of Wind) disperses it, ending the spell. Its area is Heavily Obscured. Each creature in the Sphere makes a Constitution saving throw, taking 5d8 Poison damage on a failed save or half as much damage on a successful one. A creature must also make this save when the Sphere moves into its space and when it enters the Sphere or ends its turn there. A creature makes this save only once per turn. The Sphere moves 10 feet away from you at the start of each of your turns. Using a Higher-Level Spell Slot. The damage increases by 1d8 for each spell slot level above 5.
RollQuest summary +1d8 per slot above 5.
SRD 5.2.1, p.116 · CC BY 4.0
Try this spell in RollQuest
Cast Cloudkill on a real battle map. Pick a caster and a target and RollQuest plays the effect for everyone at the table. Free to start.
Run Cloudkill through our free DnD 5e character sheet
Give Cloudkill to your character and cast it straight from the sheet. RollQuest rolls the dice with your spellcasting modifier, posts the total in chat for the table and keeps count of your spell slots. See how our DnD 5e character sheet works, for 5e and 5.5e.