"That, that was far worse than I imagined."

Kaylyn said. 

"We need to end this and get out of here. I don't intend to get within 200 feet of that thing, Even farther than that if I can help it. Let's finish this and begone."

She climbs down and walks next to Kirin.

Rhayna follows the group down the rope. She thinks to herself. “How are we supposed to defeat Demogorgon?” “Ok!! What’s the plan?” She asks everyone.

Pax stands in the crumbled down ruins of the great Drow city as her allies descend the rope behind her, emerging from a ripple in space one after another. The hero's descend the wiry underdark strand made of some type of tendon and thud to the ground.  Flames and smoke rise from dozens of patches across the crumbled ruins that minutes before had been a vast city. The tangled remains of dark skinned elves lay interspersed with demonic bodies and blobs of mold infested slime, and throughout it all the crumbled rubble of an ancient, yet evil, place. Pax scans the tremendous result of the demonic summoning, the wreckage, ruin, and death. The scene had been the most horrific of her life. It would haunt her until she died. Though, looking across the desolation at the monstrous lord of demons awaiting them, it may be a short haunting. 

The black mists swirl unnaturally about her, sparkling with cold, while her eyes had an unearthly nimbus to them. Sekkar stepped up beside her. The lizard warrior seemed to be grinning, though it could have easily been a grimace. Either way, it's anticipation was palpable, added to that was the humming from magical blade that awaited destiny. Her options for her first attack rippled through her mind as she tried to figure out how she'd do as much killing damage to this thing before it took her down. But her mind was interrupted by the words of Rhayna from behind her.  "What's the plan?"

A simple question. An obvious question really. And yet coming from the one person who'd been as mercurial and quick to act without a moments thought...for as long as she'd known her. Rhayna had always been the first to walk into a dark hole, vanish through a mushroom, or grab any random thing from the most evil of wizards collections. She'd been the one of them Pax had struggled to understand the most. The least inclined to order. What's the plan!  What's the plan?  What's the plan.

She turned to Sekkar beside her, and through the murky mist and the partial visor of her helm Sekkar and her eyes met, and she grinned....which abruptly became a laugh, one full of unabashed joy. The laugh cuts through the horror before them, a schism between two realities, horror and joy. "Rhayna?  My dear. Let's do what we do best. Let's go over there and kill the thing in the most unconventional way we can think of. Maybe we kill it with kindness. But more likely, lots of chopping and blasting."  She grins back at the others...and then says, "Those inclined to get closer, come together, stay close. Trust me. Right before it hits us I aim to teleport us so that we're surrounding it on all sides." 

Taking a short lead Pax glances back to make sure she's being followed, by Sekkar at least and then charges the lord of demons, a smile still stretched across her face as she gathers her magical energy and prepares to unleash it. 

As whichever group members decide to charge, Pax keeps within 30 feet as she rushes forward.  She has a Scatter held, and plans to unleash it the moment the creature tries to attack, damage, harm or influence any of them....trying to send each person to a different area surrounding the demon, as well as she can, or at least well and good spread out before it. 

"Hit it hard, hit it with whatever we have going," Kirin states, "Most of our cleverness and tactics were spent weakening him. I do ask a healer to remain close to me for a bit. My second spell will have a nasty backlash," Kirin pulls out his dagger in preparation.

Feel free to cast as many pre-combat buffs as you like, but if there's more than one spell with a duration of one minute or less, then let me know which order you cast them.

We will say Demogorgon is currently 150 feet away from the party (so no need for a map just yet) and surrounded by rubble but of sufficient size to provide characters with half cover if desired. Anyone can use ranged attacks while Pax and Sekkar charge into melee, but the first combat round will still begin at 150 feet. 

When you're ready, let's have some initiative rolls!! No-one is trying too hard to hide, so there is no surprise round.

Demogorgon initiative: 19

Then as a pre-combat buff (like, a round before combat) - Zephyr Strike

Sekkar Initiative: 16

Kirin: 5

Rhayna Initiative: 21

(Question for DM & group. Can and should Rhayna cast Conjure Celestial, or cross my fingers and try Divine Word?)

Pax Initiative : 12 

(hoping that Scatter held spell counts as a reaction.....) 

Kaylyn looked at Jimjar grimly.  "Five gold eh?  I'll see that bet.  Everything we have done, all the pain, sorrow, and destruction has come to this.. to rid the material plane of the threat."

Seeing as the Demogorgon is currently 150 feet away Kaylyn stays up where she is at.  The Tier Breche gave a good vantage point of the ensuing battle.  She stepped back 30 feet away from Kirin and the Demogorgon so she is 150 feet away.

Flame-like shadows wreathe her body as she casts Shadow of Moil in preparation for combat, causing her to become heavily obscured to others. The shadows turn dim light within 10 feet of her into darkness, and bright light in the same area to dim light.

Initiative 20

Then she fires an opening volley as three beams of crackling energy streak toward the Demogorgon

Attack: 23 Damage: 14 + 4 to attack roll Force damage

Attack: 20 Damage: 13 + 8 to attack roll Force damage

Attack: 28 Damage: 8 + 6 to attack roll Force damage

Looks like Rhayna is up first...

Rhayna 21, Demogorgon 19, Sekkar 16, Pax 12, Kaylyn 10, Kirin 5

And yes, Scatter can fire as a reaction. After Rhayna's turn (if Demogorgon is still on the field) then he will probably advance threateningly, and Pax can teleport anyone who is willing to the desired locations.

On the way down from the rope, Rhayna has a hopeless feeling, but a kernel of idea starts to form. With Pax’s pep talk she regains some of her confidence. Then she hears Kirin’s request for a healer to be on stand by, and she knows what she must do in order to be useful in what will be most likely the most important battle in her life. She concentrates briefly and summons a Couatl.

(Is there any surviving Drow by Tier Brecht?)

Rhayna: Yes there are surviving drow, but they are all either too frightened or confused or injured to be of much assistance. Do you have something in mind?

Couatl initiative: 12

Perhaps Rhayna's question about the plan was merely rhetorical, but the impulsive cleric is once again the first to act. With trembling breath she clasps her hands, utters her prayer to Selune, then casts her arms outward and conjures for a majestic being - a slender feathered serpent. The mystical sound of beating drums seems to fill the air as the couatl twirls, rising higher with graceful speed, and glowing softly as if with the light of the full moon. As it reaches the height of its spin, it released a cry like that of a hunting hawk, which bounces off the walls and ceiling of the cavern.

Rhayna, where would you like the couatl to appear?

If the sight of the advancing force, with their glowing swords and defensive darkness, wasn't enough to attract the demon lord's attention, then the flying serpent certainly is. With a menacing snarl of hunger issuing from one mouth and an echoing bellow of rage from the other, Demogorgon turns and shambles his hunched body toward the approaching adventurers...

Demogorgon moves 50 feet closer to the group. His eyes burn as with a fiendish fire, and his tentacles rake the ground, sending rubble flying... Does Pax respond?

Pax unleashes her Scatter.  Herself and Sekkar both appear behind the Demogorgon, 30 feet apart and a few dozen feet back from is path. Rhayna shifts 40 feet to her left. If it looks like either Kaylyn or Kirin might get struck by rubble, then she'll both of them to one side as well.  (Without a map, choosing locations is a little awkward, but she tries to give them good sight lines, keep them separate, and hopefully save them from any spray of rubble sent at them by the demon.)

(Sorry, the rubble thing was just for dramatic effect. It wasn't an actual attack or anything. Just in case that makes any difference to your choices...)

Rhayna summons the couatl behind the group. “Help me heal our group when it’s needed.”

(As for Drows by Tier Breche. Just checking if it’s worth casting a Mass Cure Wound in order to get more help.)

(Technically, Sekkar should go before Pax? Unfortunately.)

It was very polite of Demigorgon to come closer. But he still was too far to reach in one move and Sekkar had to resolve to shooting for now. He firmly planted himself on the ground, aimed, and sent three bolts at the monster.

BA: Steady Aim to remove distance disadvantage

Attack: 28 Damage: 9

Attack: 19 Damage: 10

Attack: 11 Damage: 7 + 6

(Doesn't make a difference, Pax will release the readied spell and scatter the group.)

Then another action! With readied Dawnbringer too! :) )

Full-on attack with Danbringer!

Attack: 30 Damage: 14 + 7 (force, from ZS)

Attack: 16 Damage: 12 (radiant)

Attack: 32 Damage: 15 + 8 (all radiant)

On attack that hit - Sneak Attack for 12 (radiant).

BA: Disengage and go back 30ft.

As Demogorgon approaches, Pax releases her spell, and she and Sekkar vanish and reappear at the demon lord's flanks. But who can truly evade the mighty Demogorgon, the ultimate apex predator, with his twin heads and hyper-acute senses? As quick as a flash one of his heads turns to face the upstart spellcaster. But as he does so, Pax and Sekkar, now close up to the horrid creature, can see wounds in the demon's corporeal form, and other effects of his battle with the other demon lords. Clearly he is not at full strength. It is in this brief moment of observation that the demon lord's telepathic taunt bursts into Pax's mind.

PITIFUL INSECT! TAKE YOUR PLACE AMONG THE RANKS OF THE INSANE THAT I MAY DIGEST YOUR TERROR AT MY LEISURE...

...and with that all the horrors that only briefly touched Pax's mind while watching from the dimensional hide all return like a mental punch in the face.

Pax: You need to pass a DC 23 Wisdom save or become subject to the effects of a Fear spell.

On Demogorgon's other flank, Sekkar and Dawnbringer begin their dreadful task, with Dawnbringer singing a song in Sekkar's mind more joyful than any he has yet heard as her blade cuts through demon flesh. Without so much as a backward glance, Demogorgon retaliates with a swish of his tail, swiping at the lizardman

Demogorgon Tail v Sekkar
Attack: 32 Damage: 43 bludgeoning plus Unable to parse dice roll. necrotic   

Rhayna 21, Demogorgon 19, Sekkar 16, Couatl 12, Pax 12, Kaylyn 10, Kirin 5

Rhayna, the Couatl can take an action if you command it. Then Pax can take her turn. Everyone else hold tight for a bit...