You unleash a blast of unstable elemental fire upon a creature of your choice that you can see within range. The target must make a Dexterity saving throw. The target takes 10d4 fire damage on a failed save. If the target failed their save, the fire leaps to another creature within 15 feet of them, chosen at random. The new creature must also make a Dexterity saving throw. This new target takes Xd4 fire damage on a failed save, where X = [10 - (# of times the fire has leapt)]. If the new target failed their save, the fire again leaps to a random creature within 15 feet of the new target, and continues to leap to a random creature each time a creature fails their Dexterity saving throw, each time dealing Xd4 fire damage, where X = [10 - (# of times the fire has leapt)].

If a creature succeeds on their saving throw, the fire misses the target and instead hits the ground, causing it to erupt into rippling inferno. All creatures within 15 feet of the creature that succeeded on their save (including that creature) must make a Dexterity saving throw, taking Xd4 fire damage on a failed save, or half damage on a successful save. After the explosion, the fire dies out and does not continue leaping to new targets.

Additionally, if the fire leaps to a creature that is immune to fire damage, or when X = 1, the fire dies out and does not continue leaping to new targets.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the damage increases by 1d4 for each slot level above 4th and where X = [10+Y - (# of times the fire has lept)], where Y = the amount of damage die the spell is increased by when cast at higher levels.