Okay you guys go to enter the light house. Do reach the door, you need to go around the tower a bit. Upon reaching the small door, you realize something concerning. The door is made of rotting wood and it is pretty much sealed to the rest of the tower by a thick layer of moss. This moss doesn't seem slimy though so a powerful gout of flame might be able to burn through the door or the moss or both.

Yuldra dismisses her bow, summons a really, REALLY long lance and has a go at breaking the door from a distance.

Attack : 16 for 13 damage

She pokes the door and it breaks after a few hits. There are more moss and fungi in the walls of the tower. The two plants seem to have formed a symbiotic relationship, making for a bulbous mass that is quite strange to look like. The combination looks like a bunch of small insect eggs carpeting a green base.

Varis stands a safe distance back and covers his face again. One of you magical types wanna have a go at burning the shit outta that?

"I hate this island. If only the brochure had stressed how flammable everything on it is...." Yuldra laments to no one in particular, dismissing her oversized lance in favour of her trusty longbow.

We haven't rested since clearing the last bit of moss before so Endurance has no fire 

Just to be clear, the fungus sacks are on the wall and don't block your path. You can enter the tower and progress to the top via the spiral stairs without burning the moss.

Varis will douse it with a flask of oil, and attempt to light it with his tinderbox.

Are you sure you want to do that? You'll have to get within 5ft of it.

Varis looks uneasily at the....thing. How about a mage hand?

Yeah, you can stand outside and use mage hand.

Wait, you said that in-character so I'm not supposed to respond to that.

(Yeah Varis doesn't have it...he's hoping a magical type does)

Endurance, the fighter who is definitely not magic, will cast mage hand and cover the sacks with oil and light it. Using Varis' tinderbox and oil.

(Yes, that's not magicky at all)

Okay so Endurance has to stand in front of the door. Everyone who is standing within 5ft of Endurance roll a DEX save.

EDIT: Endurance has to roll a DEX save too.

(I think he's talking to you, Varis....)

(Endurance isn't standing within 5ft of Endurance. But as I guess it includes me, 17.

And I am not magicy. It is my racial ability)

Varis is definitely not anywhere near that thing...he handed over his stuff and backed the f up.

I was with Endurance. Dex 7

The mushroom and fungi sizzle. Then an explosion rocks the tower and a wave of flame is released from the door like the breath of a red dragon. Endurance and Glory both manage to duck away at the last minute. Causing some burns but not complete burns.

Both of you will take 1/4 th (Due to resistance and successful DEX saves) of: 22 Fire damage  (I will edit the character sheet)

The walls of the towers and now blackened but the lighthouse still stands. It was dwarven construction so it won't go down that easily. The stairwell inside seems to have been cleansed of fungus and moss.