Kat had been wandering the treasure area, looking for anything that was of interest, but now she has come back to join the others. She shrugs and would show anything she found that was of interest. "Someone said this place was likely crashing, but it seems to have steadied out for now." She comments, not feeling the place falling any longer. "Do we take more time to go through this treasure, or do we want to head up and deal with the rest of the cultists here?"

Torman moves further north where the treasure is and starts scooping it in the saddle bag he was given. But when he opens it a vast amount spills out, much more than it seems the bag should hold. Then he puts more of the treasure in the bag and it doesn't even bulge 

"I think these are some kind of bags of holding. I wouldn't put them in a Rope trick if I were you!"

There is a roar from below the castle and the sound of distant Ice cracking occurs and the castle falls you think another 100ft then stabilizes.  

(You guys think there maybe around 10,000 worth of gems and gold here.)

While wondering what to do next, Gryrig will try to stuff his pockets with some gems. He's also thinking that there may be some magic items. Either something clearly magical, or something out of place looking, like and apparently "metal" sword in a pile of otherwise invaluable treasure.

Perception 21

With the average of 5 this is what you find in magic items The cultist obviously picked over the best but missed a few

Potion of vitality

Necklace of fireballs 7 beads

Periapt of health

Potion of healing (superior)

Potion of healing (supreme)

Ring of fire elemental command

Ring of protection

Staff of Defense +1 

Nine lives stealer rapier 2 charges

Dwarven plate

The castle shudders as you gather the last of the treasure into the saddle bags...

Torman "I do still have the feather fall spell"

You note the sound of wind and its at its loudest to the furthest north east tunnel.

Duncan:

Shoveling the more valuable coins, gems, and such into the saddlebags of holding, Duncan finds a ring and pockets it for the moment.

Hearing Torman’s admonition, Duncan goes as fast as he can, preparing to follow to the nearest opening as soon as the treasure is secure.

As soon as it is done, he races to the loudest tunnel, hoping they can get out before the castle crashes…

Azzure finds an incredible suit of armor, and he changes into it as fast as he can.  He grabs some gold into his bag and gems that he sees, takes an odd looking necklace and a potion, then looks to follow Duncan as quickly as he can.  “Which way?  We need to get out of here!”

Gryrig picks up the Staff of Defence which he marvels at, and then grabs any potions or other leftovers. He stuffs his pockets and bag with as many jewels as he can carry.

"I don't like the feel of this rock. We better get moving. Quickly"

Kat grabs an ebony-black rapier, as well as a ring with fire patterns engraved on it. She finds a necklace with several beeds on it and picks that up as well. She would shove any potions, gems, coins, or other bits she find around her into her pack and/or saddle bag, then nods to the tunnel where the wind sounds the loudest. "Let's go that way, our friend here has a spell to let us drop slowly to the ground, so let's get off this rock as quickly as we can."

Kat is grabbing the necklace of fireballs, but only to get it out with us for sure. If someone else wants it then just ask Kat for it once we are down.

Kat finds a green suit of armor Scale Male but it seems more flexible than scale. 

You are assaulted with a blast of cold air, as you come to a porch/landing area. The the view is from a half a mile above the horizon. The sky has dots of white fluffy clouds the sun is setting. upon snow capped mountainous terrain  One would stand there in awe if it weren't for the dire situation.

Torman ties a rope to himself then hands the rope to each of you. "Tie yourselves to me, your best bet is to protect me. I'm going to cast feather fall when appropriate. Stay within 30ft of me and you'll survive the fall."

Glazhael suddenly dives 30ft past the entrance to assault the vulnerable bottom of this flying fortress, In a blind rage she doesn't see you.

The group has an action

Azzure ties off the rope, bracing himself for the fall.  If in dim light or darkness, he can assist with flying toward the end of the drop.  “Brace yourselves, everyone get ready!”

"That dragon is coming at us as soon as we are spotted." Kat comments to the group. She ties the rope to herself, then readies her bow. "Remember that, if we are all within 30 feet of a point, we are all also likely going to get hit by the dragon's breath attack, so keep that in mind..."

Duncan:

Tying himself off as well (with approx 25 feet of rope), Duncan says, “Is this Flying Fortress doomed, or can we save it by defeating the dragon?  I would not have the giant’s home destroyed if we can avoid it.”

”Perhaps I should use the necklace of fireballs, as I have no other effective way to attack the dragon at a distance,” he adds.

Suddenly the dragon flashes by and for a second he considers diving through the air after it…but the chances he will land on it cleanly and not fall to his death seem rather slim…

Gryrig ignores the rope and instead focuses on the dragon. He suspects the dragon itself may be nearly spent. As it passes, he throws his Psychic Blades at the dragon (action, and linked bonus action).

Attack: 20 Damage: Unable to parse dice roll.

Attack: 18 Damage: 7

(Gryrig himself had some Bard the training and his skills include some simple magic such as Feather Fall, so he cal afford not to worry about the rope)

Torman continues to look out from their precarious perch as his friends tie the rope around their waists, all but Gryrig, but he seems to have his own way.  Nodding to each of them, he prepares himself to jump, and then sees an opportunity present itself as the white dragon flies past.  

Ignoring all around him, the wind as it whips through his long white beard, he focuses solely on the dragon as it speeds past.  Casting fireball a bright streak of light shoots from his pointer finger to a spot just past the dragon.  Choosing this spot so that the dragon is encompassed in the spell, but it is at least 10 feet away from them, the spot he chooses blossoms into a great flame that grows to a 40' diameter fireball.

The dragon needs to make a DEX save of 15 or take 26 fire damage, half if saved.

Glazhael is still moving fast towards the bottom of the castle when an arrow tags her. She tries to stop but a streak of fire passes her, then explodes enveloping her fully. Then the fire, just licking part of the castle causes it to groan and shutter and start to fall. The dragons form floats directionless, upwards with the chill of the cold air accelerating with it.

Duncan:

Seeing the wind start to rush by with increasing speed, Duncan says, “Time to leave,” and takes a running jump out of the tunnel…

Athletics if needed:  17

Gryrig has a quick last look back over his shoulder at the vast gold hoard they are leaving behind, grits his teeth and then takes a running jump to follow Duncan's lead.  Once in the air Gryrig will cast feather fall on himself and his companions.

(How high are we? Feather fall is waste above 600ft height as we would run out of time. And ideally we should wait to cast it until closer to the ground as G does not fancy spending a whole minute slowly drifting down - potentially being dragon/eagle/whatever-fodder) 

Quote from Stormbringer4729 >>

Glazhael is still moving fast towards the bottom of the castle when an arrow tags her. She tries to stop but a streak of fire passes her, then explodes enveloping her fully. Then the fire, just licking part of the castle causes it to groan and shutter and start to fall. The dragons form floats directionless, upwards with the chill of the cold air accelerating with it.

 (Just to clarify: Does this mean Glazhael is dead?)

The group jumps and starts floating tied to one another. Everyone realizes that they are much higher up than they thought and it might take 2 minutes to reach the ground. Now 3 or 4 with Gryrig's spell in play. The castle doesn't fall straight down but like a snowball at an arch. Looking up you see Glazhael's lifeless body but still slightly aerodynamic. It looks like its falling towards you!

Going on the last Initiative order to see what solution you guys come up with but post at will.

Gryrig

Duncan

Azzure

Kat

Torman 

Glazhael  may cause damage and loss of concentration of a spell caster when or if she collides. And the grappled effect.