To your shock, the tiny lights are extremely agile, and dodge the flaming sphere with ease. And although Maxine aims her spell well, and catches one of the lights, the ray seems to bounce off, harmlessly. So, not only agile, but also hardy.

Dex save: 28 vs 13

The Professor:

OOC:  Did the magical fire do any damage?  Normally on a successful save the target still takes half damage.

Professor, you're unsure. The light made attempts to avoid the flames, and didn't seem much fazed by the heat.

OOC: I'm not sure if Shae means to hold her action, or not, but I'm moving forward, and if necessary I can have her action take place later. I had to delete the above post, because I had forgotten the disadvantage imposed on the first attack by Berrus' Protection, and wanted to avoid the manipulated dice rolls.

Seeing the Professor cast a flaming sphere, both orbs of light float towards the Professor, one of them passing directly through Berrus, seemingly unimpeded. Surprised, the gnome is caught unawares, but Berrus attempts to deflect the first electric jolt. In short succession, the white orb of light discharges, now with easier access to the Professor, free of interfering dwarves. Thanks to Berrus' intervention however, both jolts of electricity miss their target.

The Professor:

Unable to tell if the sphere did anything, but having no other spells that attack magically, the Professor declares to the evil spirit lights, “We are here to see the Horned Lady. Move aside or be destroyed.”

With his left hand, he gestures in a drawing forward motion, pulling the flaming sphere up behind the wisp he attacked before, trying to burn it at least some.  With his right hand, he  bends the air to his will, thrusting it at the wisp and trying to pin it against the flaming ball.

Quote from NemoCaptain >>

Professor, you're unsure. The light made attempts to avoid the flames, and didn't seem much fazed by the heat.

OOC: Yes, you did 1 point of damage. But for metagaming reasons I dislike letting you as a player know the exact damage you've dealt, and instead I'm trying to narrate the effects. 

 

The white Orb lazily moves to avoid the flaming sphere from behind, but is immediately pushed against the flaming sphere, unable to evade the wind, and surprised by the sudden gust of air. You don't hear it cry out or otherwise react to the flames, but the light of the orb shifts to an angry red.

Probably, there was not much life to begin with, so, there was nothing to take. Maxine sighed and tried catch one of the orb into bonfire: Create Bonfire (Dex 15) 6

OOC: Sorry Maxine, my writing was unclear. Your attack didn't pass their DC

Focusing her attention on a spot close to the blue light, Maxine managed to create a bonfire without any issues, but before the flames could affect the orb, it rapidly hovered fifteen feet into the air to avoid the flames. If it was affected, you cannot tell.

The Professor:

(Not sure if Comprehend Languages is still up, or if they can understand him, but they appear to not be talking/ responding.  Nevertheless, the Professor is nothing if not a talker, so he keeps talking...)

Speaking to the other wisp, the Professor says, ”Withdraw and I will release your companion.”

OOC  are there any combustible materials near

otherwise Berrus will continue to try and protect the party

Shae would be hugging her tome tightly, eye's going wide and narrowing as she watches the lights dance around their attacks and remain on the offensive. She couldn't quite tell what worked and what didn't. She also didn't know what magic she had available to her with the absence of Kam. Spending too much time contemplating, the warlock would grip her tome tightly, and cry out in frustration. "We just want to do what's right! I'm tired of suffocating in this darkness!" She'd look up to the stars, fighting back tears of frustration. "We need light on our side!"

(Casting: Word of Radiance Damage: 4 Radiant damage Con DC 13)

One of the orbs is caught up in the radiating light that seems to shine down on a desperate Shae, and seem to be stunned by the divine nature of the attack. Now, both orbs shimmer in a red hue.

 If this is the case, Maxine will try to catch one of the red orb: Ray of Sickness Attack: 10 Damage: 9 (plus Con 15 save, or poisoned)

Maxine tries again, but her attack misses the orb, which deftly evades the incoming ray, and then starts to lazily float towards Maxine, as if to taunt her.

Berrus shifts in order to be closer to Maxine

Protection still in effect

Feeling a glitter of hope, Shae will grip the tome tight to her chest one again to call upon the radiant light to defend them against their foes.

(Understood about the mental exhaustion. Chancing it and casting: Word of Radiance Damage: 1 Radiant damage Con DC 13 [lol])

Sorry Berrus, yes, you take a dead branch nearby and set it on fire. It burns rather poorly, but you hold it out in front of you, while being ready to protect your friends. 

Shae is again cast in a bright light, which touches upon the other orb. There’s no real way to tell whether you have been effective or not.

In hope that third time is a charm, Maxine tried ones again: Ray of Sickness Attack: 10 Damage: 10 (plus Con 15 save, or poisoned)

The Professor:

(Not sure when it is the Professor’s turn again—his actions will depend on whether the other wisp flees as instructed or keeps attacking).

If the other orb continues to attack, the Professor will keep both hands engaged in the spells, pulling the ball of Fire forward with his left hand (bonus action) and pushing the wisp against it with his right (action—Gust).  

(A creature who ends their turn adjacent to the fire or is hit by the fire as the Professor moves it is subject to the fire damage, but RAW gets a Dexterity Save in either case.  I have no idea how the Gust modifies that, so please feel free to apply the appropriate effect/fire damage).

if the other wisp flees, the Professor will move the Flaming Sohere out of the way and use gust to start the recently trapped wisp on its way to retreat with its companion.