[This spell can be substituted on any known spell list wherever Otiluke's Freezing Sphere is present or available.]
A flaming, orange globe of fiery energy streaks from your fingertips to a point within range you can see, where it erupts into a 60' sphere. Each creature touching that sphere must CON SAV, taking 12d6 damage on a failed save, or half as much on success.
Creatures underwater are immune to the effect.
If you wish, you can refrain from firing the the globe after completing the spell. A small globe, about the size of a sling stone, warm to the touch, appears in your hand. You can give this stone to a creature to throw it to a range of 40', or sling it to within that sling's range. On impact, it shatters, resulting in the normal effect. If the stone is set down, it doesn't shatter, but still explodes when shattered (e.g., when struck) or after 1 minute. The damage, when stored this way, increases by 1d6 at the end of each of your turns after its creation, up to a maximum of 18d6.
When cast at levels above 7, add 6d6 damage to the effect and to the maximum when cast in a delayed fashion for each level above the 7th.